Perhaps you should try some spelling variations:
nhanh muong » nhanh chuong, nhanh quang, nhanh chong
thanh thong » thanh thuong, thanh hong, thanh chuong
thanh thang » nhanh thang, thanh thanh, thanh hang
doi chieu » doc hieu, doi chi, mot chieu
ho chieu » theo chieu, hoc thieu, mot chieu
cong tac » cong ty
tac toan » tap toan, tam toan, hach 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: ((ho chieu) OR (doi chieu)) sach - nhanh muong ((thanh thong) or (thanh thang)) cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) sach - nhanh muong ((thanh thong) OR (thanh thang)) cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (doi chieu)) sach - nhanh muong ((thanh thong) or (thanh thang)) cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) sach - nhanh muong ((thanh thong) or (thanh thang)) cong tac toan cau*.