Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
hoang manh » hoang minh, hoang anh, hoang xanh
nhung cong » dung cong, thong cong, hang cong
hanh manh » hanh mang, lanh manh, thanh minh
cong tan » cong tac, cong san, cong thanh
toan ban » van ban
toan cao » 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 sach - ((hanh manh) OR (hoang manh)) va nhung cong tan ((toan ban) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - ((hanh manh) OR (hoang manh)) va nhung cong tan ((toan ban) or (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - ((hanh manh) OR (hoang manh)) va nhung cong tan ((toan ban) or (toan cao))*.