Perhaps you should try some spelling variations:
"phat trien nang khieu cua van khang." » "phat trien nong khieu cua van khang." (Expand Search), "phat trien lang khieu cua van khang." (Expand Search), "phat trien van khieu cua van khang." (Expand Search), "phat trien nang hieu cua van khang." (Expand Search), "phat trien nang thieu cua van khang." (Expand Search), "phat trien nang kieu cua van khang." (Expand Search), "phat trien nang khieu cua dan khang." (Expand Search), "phat trien nang khieu cua dang khang." (Expand Search)
"phat trien nang khieu cua van thanh." » "phat trien nong khieu cua van thanh." (Expand Search), "phat trien lang khieu cua van thanh." (Expand Search), "phat trien van khieu cua van thanh." (Expand Search), "phat trien nang hieu cua van thanh." (Expand Search), "phat trien nang thieu cua van thanh." (Expand Search), "phat trien nang kieu cua van thanh." (Expand Search), "phat trien nang khieu cua ban thanh." (Expand Search), "phat trien nang khieu cua van thang." (Expand Search), "phat trien nang khieu cua tran thanh." (Expand Search), "phat trien nang khieu cua dan thanh." (Expand Search), "phat trien nang khieu cua dang thanh." (Expand Search)

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("phat trien nang khieu cua van khang.") OR ("phat trien nang khieu cua van thanh."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"phat trien nang khieu cua van khang.\") OR (\"phat trien nang khieu cua van thanh.\"))".
• Removing quotes may allow a broader search: (( phat trien nang khieu cua van khang. ) OR ( phat trien nang khieu cua van thanh. )).
• Adding a wildcard symbol may retrieve word variants: (("phat trien nang khieu cua van khang.") OR ("phat trien nang khieu cua van thanh."))*.