Perhaps you should try some spelling variations:
thanh tung » thanh cong
hanh trinh » canh tranh, hanh chinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
thong dan » thong van, tuong dan, thong den
hoc hieu » hoc thieu, hoc hien, doc hieu
va thong » va thuong, va phuong, he thong
than cap » khan cap, thanh lap, thanh cac
phan cau » phan dau, phan cac, phan tu

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 manh - ((thanh tung) or (hanh trinh)) va thong thong dan ((than cap) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - ((thanh tung) OR (hanh trinh)) va thong thong dan ((than cap) OR (phan cau)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - ((thanh tung) or (hanh trinh)) va thong thong dan ((than cap) or (phan cau))*.