Perhaps you should try some spelling variations:
truong cua » truong ca, truong quan, truong cao
nhung cong » dung cong, thong cong, hang cong
trung cua » trung tuan, trung cap, dung cua
doc hieu » hoc thieu, hoc hien
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: ((doc hieu) or (toc thieu)) xanh - thanh ((trung cua) OR (truong cua)) nhung cong tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) xanh - thanh ((trung cua) OR (truong cua)) nhung cong tac toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (toc thieu)) xanh - thanh ((trung cua) OR (truong cua)) nhung cong tac toan ban".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) xanh - thanh ((trung cua) OR (truong cua)) nhung cong tac toan ban*.