Perhaps you should try some spelling variations:
"phat trien van khieu cua ban than." » "phat trien van kieu cua ban than." (Expand Search), "phat trien van hieu cua ban than." (Expand Search), "phat trien van chieu cua ban than." (Expand Search), "phat trien van thieu cua ban than." (Expand Search), "phat trien van khieu cua ban thanh." (Expand Search), "phat trien van khieu cua ban thao." (Expand Search), "phat trien van khieu cua van thang." (Expand Search), "phat trien van khieu cua dan than." (Expand Search), "phat trien van khieu cua can than." (Expand Search), "phat trien van khieu cua dang than." (Expand Search)
"phat trien ben khieu cua bao than." » "phat trien ben hieu cua bao than." (Expand Search), "phat trien ben thieu cua bao than." (Expand Search), "phat trien ben kieu cua bao than." (Expand Search), "phat trien ben thien cua bao than." (Expand Search), "phat trien ben tieu cua bao than." (Expand Search), "phat trien ben khieu cua bao thanh." (Expand Search), "phat trien ben khieu cua bao thang." (Expand Search), "phat trien ben khieu cua bao nhan." (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 van khieu cua ban than.") OR ("phat trien ben khieu cua bao than."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"phat trien van khieu cua ban than.\") OR (\"phat trien ben khieu cua bao than.\"))".
• Removing quotes may allow a broader search: (( phat trien van khieu cua ban than. ) OR ( phat trien ben khieu cua bao than. )).
• Adding a wildcard symbol may retrieve word variants: (("phat trien van khieu cua ban than.") OR ("phat trien ben khieu cua bao than."))*.