Perhaps you should try some spelling variations:
"cppcong trinh do phan." » "cong trinh do phan." (Expand Search), "chuuong trinh do phan." (Expand Search), "phuong trinh do phan." (Expand Search), "cppcong trinh mon phan." (Expand Search), "cppcong trinh co phan." (Expand Search), "cppcong trinh so phan." (Expand Search), "cppcong trinh bo phan." (Expand Search)
"vuong trinh hoc dan." » "cong trinh hoc dan." (Expand Search), "vuong trieu hoc dan." (Expand Search), "vuong trung hoc dan." (Expand Search), "vuong trinh hoi dan." (Expand Search), "vuong trinh mon dan." (Expand Search), "vuong sinh hoc dan." (Expand Search)
"chuong trinh khac phan." » "chuong trinh phat phan." (Expand Search), "chuong trinh khac han." (Expand Search), "chuong trinh khac phat." (Expand Search), "chuong trinh khai 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: (((("vuong trinh hoc dan.") OR ("cppcong trinh do phan."))) OR ("chuong trinh khac phan."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"vuong trinh hoc dan.\") OR (\"cppcong trinh do phan.\"))) OR (\"chuong trinh khac phan.\"))".
• Removing quotes may allow a broader search: (((( vuong trinh hoc dan. ) OR ( cppcong trinh do phan. ))) OR ( chuong trinh khac phan. )).
• Adding a wildcard symbol may retrieve word variants: (((("vuong trinh hoc dan.") OR ("cppcong trinh do phan."))) OR ("chuong trinh khac phan."))*.