Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
khi xanh » khia canh, thi hanh, thi anh
trung va » truong va, trang va, trung tam
trung ha » trung hoc, trung tam, trung cap
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan ban » van ban

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 - manh ((trung va) OR (trung ha)) nhung cong tac toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi khi xanh - manh ((trung va) OR (trung ha)) nhung cong tac toan ban".
• Adding a wildcard symbol may retrieve word variants: doi khi xanh - manh ((trung va) OR (trung ha)) nhung cong tac toan ban*.