Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu cach » hieu cac, chieu sach, hieu ca
hoc hieu » hoc thieu, hoc hien, doc hieu
trinh va » trinh van, trinh vat, trinh ve
va thong » va thuong, va phuong, he thong
dan than » dan chan, van than, dan toan
ban than » ban thanh, van thanh, ban hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu cach - hanh trinh va thong thong ((dan than) or (ban than)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu cach - hanh trinh va thong thong ((dan than) OR (ban than)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc hieu cach - hanh trinh va thong thong ((dan than) or (ban than)) ban*.