Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
cong nganh » cong ngang, trong nganh, duong nganh
nganh toan » nganh thanh, thanh toan, manh toan
hoc thieu » toc thieu, hoc hien
toan ban » van ban
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 nganh toan 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 nganh toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - canh tranh ((va bang) or (va ban)) cong nganh toan ban*.