Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
cong luong » cong thuong, nang luong, cong dong
hoc thieu » toc thieu, hoc hien
cong lang » cong vang, cong quang, cong ngang
thanh ban » thanh san, thanh van, thanh bac
va bang » va nang, va lang, va hang
va ban » van ban, va bai, va bao

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sach - canh tranh ((va bang) or (va ban)) ((cong lang) OR (cong luong)) thanh ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - canh tranh ((va bang) OR (va ban)) ((cong lang) OR (cong luong)) thanh ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - canh tranh ((va bang) or (va ban)) ((cong lang) OR (cong luong)) thanh ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - canh tranh ((va bang) or (va ban)) ((cong lang) OR (cong luong)) thanh ban*.