Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
doi chieu » doc hieu, doi chi, ho chieu
nang cong » nang song, bang cong, hang cong
dang cong » dung cong
trinh va » trinh van, trinh vat, trinh ve
van tan » van tuan, van ban, van tai

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 sach - hanh trinh va ((nang cong) OR (dang cong)) ((van tan) or (tinh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh trinh va ((nang cong) OR (dang cong)) ((van tan) OR (tinh toan)) cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - hanh trinh va ((nang cong) OR (dang cong)) ((van tan) or (tinh toan)) cau*".