Perhaps you should try some spelling variations:
khong xuong » khong dung, hong vuong, thong duong
tranh hoac » thanh hoach, thanh hoa, trinh hoa
hoac khong » hoa khong, hoc khong, hay khong
doi chieu » doc hieu, doi chi, ho chieu
hoc thieu » toc thieu, hoc hien
xuong bai » cuong bai, xuong cai, xuong banh
bai toan » bai tap
toan cau » 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: ((doi chieu) or (hoc thieu)) xanh - canh tranh hoac khong xuong bai toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (hoc thieu)) xanh - canh tranh hoac khong xuong bai toan cau*.