Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, ho chieu
hanh tang » hanh trang, anh tang, hanh mang
dung cong » dung trong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan ban » van ban
tang va » trang va, tang van, thang va
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo tieu) or (((hoc hien) or (doi chieu)))) xanh - hanh tang va dung cong tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo tieu) OR (((hoc hien) OR (doi chieu)))) xanh - hanh tang va dung cong tac toan ban.
• Adding a wildcard symbol may retrieve word variants: ((theo tieu) or (((hoc hien) or (doi chieu)))) xanh - hanh tang va dung cong tac toan ban*.