Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu lang » chieu sang, hieu quang, nhieu tang
van phong » van dong, hai phong
nho hieu » nha hieu, nho sieu, nhu hieu
va thong » va thuong, va phuong, he thong
toan ban » van ban
va toan » van toan, bai toan, tap toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: nho hieu lang - hanh trinh ((va thong) or (van phong)) hang va toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nho hieu lang - hanh trinh ((va thong) OR (van phong)) hang va toan ban*.