Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
tang thanh » dang thanh, trung thanh, hoang thanh
thanh chau » thanh cha, thanh cham, thanh chu
tieu xanh » tieu danh, chieu xanh, dieu hanh
tong cong » trong cong, cong cong, dung cong
trung va » truong va, trang va, trung tam
trung ha » trung hoc, trung tam, trung cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu xanh - thanh ((trung va) OR (trung ha)) ((nhung cong) or (tong cong)) tang thanh chau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - thanh ((trung va) OR (trung ha)) ((nhung cong) OR (tong cong)) tang thanh chau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu xanh - thanh ((trung va) OR (trung ha)) ((nhung cong) or (tong cong)) tang thanh chau".
• Adding a wildcard symbol may retrieve word variants: theo tieu xanh - thanh ((trung va) OR (trung ha)) ((nhung cong) or (tong cong)) tang thanh chau*.