Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, thong thong, phong chong
hoc thien » hoc hien, hoc thieu, hoc thiet
tong cong » trong cong, cong cong, dung cong
van thanh » ban thanh, van tuan
trinh va » trinh van, trinh vat, trinh ve
dan than » dan chan, ban than, van than

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

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