Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » thanh trung, canh tranh, minh trang
hanh trinh » canh tranh, hanh chinh
toc chieu » toc thieu, doc hieu, hoc thieu
bang cong » dang cong, bang song, dung cong
hang cong » dang cong, hang nong, thanh cong
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: toc chieu sach - ((hanh trang) or (hanh trinh)) va ((bang cong) OR (hang cong)) tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc chieu sach - ((hanh trang) OR (hanh trinh)) va ((bang cong) OR (hang cong)) tinh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc chieu sach - ((hanh trang) or (hanh trinh)) va ((bang cong) OR (hang cong)) tinh toan ban".
• Adding a wildcard symbol may retrieve word variants: toc chieu sach - ((hanh trang) or (hanh trinh)) va ((bang cong) OR (hang cong)) tinh toan ban*.