Perhaps you should try some spelling variations:
trinh chuan » trinh han, trinh quan, trinh luan
thieu xanh » chieu xanh, hieu manh, thien anh
canh trinh » canh tranh, hanh trinh, canh tinh
cong luong » cong thuong, nang luong, cong cong
dan toan » van toan, dan than, manh toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu xanh - canh trinh chuan ((cong luong) or (cong dong)) dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu xanh - canh trinh chuan ((cong luong) OR (cong dong)) dan toan ban.
• Adding a wildcard symbol may retrieve word variants: toc thieu xanh - canh trinh chuan ((cong luong) or (cong dong)) dan toan ban*.