Perhaps you should try some spelling variations:
muong thanh » truong thanh, dong thanh, cong thanh
nhanh muong » nhanh chuong, nhanh quang, nhanh chong
thanh tong » thanh cong, thanh tung, thanh long
tong cong » trong cong, cong cong, dung cong
ho chieu » theo chieu, hoc thieu, doi chieu
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
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: ((theo tieu) or (ho chieu)) sach - nhanh muong thanh tong cong tap toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo tieu) OR (ho chieu)) sach - nhanh muong thanh tong cong tap toan cau.
• Adding a wildcard symbol may retrieve word variants: ((theo tieu) or (ho chieu)) sach - nhanh muong thanh tong cong tap toan cau*.