Perhaps you should try some spelling variations:
tong cong » trong cong, cong cong, dung cong
chi xanh » chi anh, chi danh, chi hanh
trung va » truong va, trang va, trung tam
trung ha » trung hoc, trung tam, trung cap
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap
doi chi » doi khi

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

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