Perhaps you should try some spelling variations:
trinh thiet » trinh viet, trinh thi
chieu xanh » chieu sach, chieu sang, chieu tinh
hung cuong » hung vuong, hong cuong, hung luong
doi chieu » doc hieu, doi chi, ho chieu
trinh vat » trinh van, trinh luat, sinh vat
cuong dan » cuong danh, huong dan, cong dan
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu xanh - hanh ((trinh thiet) or (trinh vat)) hung cuong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - hanh ((trinh thiet) OR (trinh vat)) hung cuong dan than cao.
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - hanh ((trinh thiet) or (trinh vat)) hung cuong dan than cao*.