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

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 viet)) hung cuong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - hanh ((trinh thiet) OR (trinh viet)) hung cuong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: doi chieu xanh - hanh ((trinh thiet) or (trinh viet)) hung cuong dan toan cao*.