Perhaps you should try some spelling variations:
nhanh thang » nhanh thanh, nhanh quang, hanh trang
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
hanh mang » nhanh mang, hanh trang, nhanh lang
cong ban » cong bang, cong tan, cong dan
cong san » cong tac
than dau » phan dau, thau dau, han dau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - ((hanh mang) or (nhanh thang)) va nhung ((cong ban) OR (cong san)) than dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - ((hanh mang) OR (nhanh thang)) va nhung ((cong ban) OR (cong san)) than dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - ((hanh mang) or (nhanh thang)) va nhung ((cong ban) OR (cong san)) than dau".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - ((hanh mang) or (nhanh thang)) va nhung ((cong ban) OR (cong san)) than dau*.