Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thieu xanh » chieu xanh, hieu manh, thien anh
thanh tung » thanh cong
tung tran » trung tran, hung tran, huong tran
tran tong » tran trong, tran thong, tran tuong
cong tac » cong ty
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) or (thien thanh)) - thanh tung tran tong ((cong san) OR (cong tac)) phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien thanh)) - thanh tung tran tong ((cong san) OR (cong tac)) phan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (thien thanh)) - thanh tung tran tong ((cong san) OR (cong tac)) phan dau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (thien thanh)) - thanh tung tran tong ((cong san) OR (cong tac)) phan dau*.