Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
trang cua » tang cua, trung cua, thang cua
tranh cua » doanh cua, manh cua
theo chu » theo chieu, cho chu, chao chu
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan
phan dau » phan tu, hang dau

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 chu) OR (ho chieu)) sach - hanh ((trang cua) OR (tranh cua)) nhung cong tan phan dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chu) or (ho chieu)) sach - hanh ((trang cua) OR (tranh cua)) nhung cong tan phan dau~".
• Adding a wildcard symbol may retrieve word variants: ((theo chu) or (ho chieu)) sach - hanh ((trang cua) OR (tranh cua)) nhung cong tan phan dau*.