Perhaps you should try some spelling variations:
chiet tach » chieu sach
thien danh » thien anh, thien dang, thien thanh
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh chua » tranh cua, trinh chuan, tranh chap
hang cong » dang cong, hang nong, thanh cong
bang cong » dang cong, bang song, dung cong
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chiet tach) or (thien danh)) - hanh tranh chua ((hang cong) OR (bang cong)) dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chiet tach) OR (thien danh)) - hanh tranh chua ((hang cong) OR (bang cong)) dan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chiet tach) or (thien danh)) - hanh tranh chua ((hang cong) OR (bang cong)) dan than cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chiet tach) or (thien danh)) - hanh tranh chua ((hang cong) OR (bang cong)) dan than cau*.