Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hanh trinh » canh tranh
nhung cong » dung cong, thong cong, hang cong
hoc thien » hoc hien, hoc thieu, hoc thiet
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan cau » toan cao, toan ban, toan tap

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) or (hanh chinh)) va nhung cong van toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - ((hanh trinh) OR (hanh chinh)) va nhung cong van toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - ((hanh trinh) or (hanh chinh)) va nhung cong van toan cau*.