Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
doc hieu » toc thieu, hoc thieu, hoc hien
vat dung » van dung, viet dung, mat duong
cong tac » cong ty
tac phat » tac pham, tam phat, tan phat
phat cau » phan cau, pha cau, phap cau
va dung » van dung, va duong, va ung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (doc hieu)) xanh - canh tranh ((va dung) or (vat dung)) cong tac phat cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (doc hieu)) xanh - canh tranh ((va dung) OR (vat dung)) cong tac phat cau.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (doc hieu)) xanh - canh tranh ((va dung) or (vat dung)) cong tac phat cau*.