Perhaps you should try some spelling variations:
thanh tung » thanh cong
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
tung cap » trung cap, cung cap, thong cap
cap dung » ap dung, cao dung, chan dung
cong tan » cong tac, cong san, cong thanh
toan ban » van ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo tieu) OR (doc hieu)) xanh - thanh tung cap dung cong tan ((toan tap) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo tieu) or (doc hieu)) xanh - thanh tung cap dung cong tan ((toan tap) OR (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: ((theo tieu) or (doc hieu)) xanh - thanh tung cap dung cong tan ((toan tap) OR (toan ban))*.