Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
hoc thieu » toc thieu, hoc hien
dang cong » dung cong
doc hieu » toc thieu, hoc hien
trinh ve » trinh he, trinh va, trinh vi
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap
ve dang » le dang, vu dang, de dang

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) or (hoc thieu)) xanh - canh trinh ve dang cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc thieu)) xanh - canh trinh ve dang cong tan toan cau.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc thieu)) xanh - canh trinh ve dang cong tan toan cau*.