Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
canh tinh » hanh tinh, manh tinh, canh tranh
tinh luan » trinh luan, binh luan, minh luan
luan nang » luan van, van nang, luan san
nang cong » nang song, dang cong, bang cong
cong tinh » cong trinh, cong vinh, long tinh
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sach) or (trieu tinh)) - canh tinh luan nang cong tinh ((toan ban) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (trieu tinh)) - canh tinh luan nang cong tinh ((toan ban) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (trieu tinh)) - canh tinh luan nang cong tinh ((toan ban) or (toan tap))*.