Perhaps you should try some spelling variations:
thanh trung » thanh tung
hien xanh » hien hanh, hien nhanh, chieu xanh
trung ha » trung hoc, trung tam, trung cap
ha nhung » hoa nhung, hay nhung, pha nhung
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - thanh trung ha nhung ((cong tan) or (cong san)) ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - thanh trung ha nhung ((cong tan) OR (cong san)) ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - thanh trung ha nhung ((cong tan) or (cong san)) ((toan cau) or (toan tap))*.