Perhaps you should try some spelling variations:
thanh tung » thanh cong
dung cong » dung trong
doc hieu » hoc thieu
tung tay » vung tay, dung tay, nung tay
tay dung » xay dung, tac dung, tay nung
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))) or (hoc hien)) xanh - thanh tung tay dung cong tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((doc hieu) OR (toc thieu))) OR (hoc hien)) xanh - thanh tung tay dung cong tac toan ban.
• Adding a wildcard symbol may retrieve word variants: ((((doc hieu) or (toc thieu))) or (hoc hien)) xanh - thanh tung tay dung cong tac toan ban*.