Perhaps you should try some spelling variations:
choi thuc » hoc thuc, hoi chuc, cho thue
thuc xanh » thuc hanh, thuc thanh, thuc dan
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap
bang va » hang va, trang va, dang van

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

• Performing a fuzzy search may retrieve terms with similar spellings: choi thuc xanh - hanh ((bang va) or (ban va)) dung cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: choi thuc xanh - hanh ((bang va) OR (ban va)) dung cong tan toan cau*.