Perhaps you should try some spelling variations:
luan chung » luan chinh
chung cong » nhung cong, chong cong, phung cong
hoc thieu » toc thieu, hoc hien
tinh sang » tinh quang, tinh trang, trinh san
sang luan » tang luan, hang luan, san luan
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van 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: ((theo tieu) or (hoc thieu)) xanh - tinh sang luan chung cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo tieu) OR (hoc thieu)) xanh - tinh sang luan chung cong tan toan cao.
• Adding a wildcard symbol may retrieve word variants: ((theo tieu) or (hoc thieu)) xanh - tinh sang luan chung cong tan toan cao*.