Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
theo chieu » theo tieu, ho chieu, thi chieu
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
cua nhung » va nhung
theo chu » cho chu, chao chu, theo yeu
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.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo chu)) sach - ((hanh tang) OR (hanh mang)) cua nhung cong tap toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (theo chu)) sach - ((hanh tang) or (hanh mang)) cua nhung cong tap toan cau~".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (theo chu)) sach - ((hanh tang) or (hanh mang)) cua nhung cong tap toan cau*.