Perhaps you should try some spelling variations:
trinh chuan » trinh han, trinh quan, trinh luan
canh trinh » canh tranh, hanh trinh, canh tinh
chuan dung » chan dung, chuyen dung, chua dong
doi chieu » doc hieu, doi chi, ho chieu
dung cong » dung trong
danh toan » manh toan, dan toan, dang toan
anh toan » manh toan, anh tuan, thanh toan

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) or (toc thieu)) xanh - canh trinh chuan dung cong ((danh toan) OR (anh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) xanh - canh trinh chuan dung cong ((danh toan) OR (anh toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (toc thieu)) xanh - canh trinh chuan dung cong ((danh toan) OR (anh toan)) cau".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (toc thieu)) xanh - canh trinh chuan dung cong ((danh toan) OR (anh toan)) cau*.