Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
trung vap » trung cap, trung van, trung lap
ho chieu » theo chieu, hoc thieu, doi chieu
trung va » truong va, trang va, trung ha
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van 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: ((ho chieu) or (hoc hien)) xanh - thanh ((trung vap) OR (trung va)) nhung cong tan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc hien)) xanh - thanh ((trung vap) OR (trung va)) nhung cong tan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (hoc hien)) xanh - thanh ((trung vap) OR (trung va)) nhung cong tan toan ban".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (hoc hien)) xanh - thanh ((trung vap) OR (trung va)) nhung cong tan toan ban*.