Perhaps you should try some spelling variations:
thanh tung » thanh cong
thong cong » trong cong, tong cong, thong thong
hien xanh » hien hanh, hien nhanh, chieu xanh
cua thong » cua thuong, cua khong, cua tong
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, ran cau, tra cau
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 hien xanh - ((thanh trung) OR (thanh tung)) cua thong cong tan ((tran cau) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - ((thanh trung) OR (thanh tung)) cua thong cong tan ((tran cau) OR (toan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - ((thanh trung) OR (thanh tung)) cua thong cong tan ((tran cau) or (toan cau))".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - ((thanh trung) OR (thanh tung)) cua thong cong tan ((tran cau) or (toan cau))*.