Perhaps you should try some spelling variations:
chieu tach » chiet tach, chiu trach, chieu tinh
chieu sach » chinh sach, chiet tach, chieu sang
canh trinh » canh tranh, hanh trinh, canh tinh
trinh luan » trinh luat, trinh quan, trinh han
van cong » van dong, van phong, phan cong
cong anh » cong danh, dong anh, hong anh
anh phan » hanh phan, anh nhan, anh han

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu tach) OR (chieu sach)) - canh trinh luan van cong anh phan tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu tach) OR (chieu sach)) - canh trinh luan van cong anh phan tu*".