Perhaps you should try some spelling variations:
"pvuong trinh cog phan." » "vuong trinh cog phan." (Expand Search), "phuong trinh cog phan." (Expand Search), "vuong tinh cog phan." (Expand Search), "pvuong trinh cong phan." (Expand Search), "pvuong trinh co phan." (Expand Search), "pvuong trinh cuong phan." (Expand Search), "pvuong trinh tong phan." (Expand Search), "pvuong trinh chon phan." (Expand Search)
"chuong trinh con phan." » "chuong trinh cong phan." (Expand Search), "chuong trinh mon phan." (Expand Search), "chuong trinh co phan." (Expand Search), "chuong trinh chon phan." (Expand Search), "chuong trinh con than." (Expand Search), "huong trinh con phan." (Expand Search), "phuong trinh con phan." (Expand Search), "chung trinh con phan." (Expand Search)
"cong trinh so phan." » "cong trinh do phan." (Expand Search), "cong trinh co phan." (Expand Search), "cong trinh mon phan." (Expand Search), "cong trinh gop phan." (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: (("chuong trinh con phan.") OR ((("cong trinh so phan.") OR ("pvuong trinh cog phan."))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"chuong trinh con phan.\") OR (((\"cong trinh so phan.\") OR (\"pvuong trinh cog phan.\"))))".
• Removing quotes may allow a broader search: (( chuong trinh con phan. ) OR ((( cong trinh so phan. ) OR ( pvuong trinh cog phan. )))).
• Adding a wildcard symbol may retrieve word variants: (("chuong trinh con phan.") OR ((("cong trinh so phan.") OR ("pvuong trinh cog phan."))))*.