Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
cong thai » cong hai, hong thai, cong thanh
doc hieu » toc thieu, hoc thieu, hoc hien
qua dung » quang dung, su dung, qua song
cua dang » cua cong, cua ban
thai tai » thai tay, thap tai, thanh tai
tai cac » tai cuc

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 xanh - canh tranh ((qua dung) or (cua dang)) cong thai tai cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - canh tranh ((qua dung) OR (cua dang)) cong thai tai cac.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - canh tranh ((qua dung) or (cua dang)) cong thai tai cac*.