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