Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
trung cap » truong cao, trung tam
khi xanh » khia canh, thi hanh, thi anh
trung ha » trung hoc, trung tam
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
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: doi khi xanh - thanh ((trung ha) or (trung cap)) nhung cong van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi khi xanh - thanh ((trung ha) OR (trung cap)) nhung cong van toan cao*.