Perhaps you should try some spelling variations:
nganh thanh » nhanh thanh, danh thanh, nhanh thang
cong nganh » cong ngang, trong nganh, duong nganh
thieu sach » chieu sach, thien hach, theo sach
hieu cach » hieu cac, chieu sach, hieu ca
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) OR (hieu cach)) - canh tranh ((va bang) or (va ban)) cong nganh thanh ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (hieu cach)) - canh tranh ((va bang) OR (va ban)) cong nganh thanh ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) OR (hieu cach)) - canh tranh ((va bang) or (va ban)) cong nganh thanh ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) OR (hieu cach)) - canh tranh ((va bang) or (va ban)) cong nganh thanh ban*.