Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
nhanh lang » nhanh quang, nhanh thang, nhan dang
thanh tap » thanh lap, thanh tai, thanh tay
nong van » song van, nong san, tong van
nong dan » cong dan, nong san, nguong dan

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 - nhanh lang ((cua nhung) or (va nhung)) ((nong van) OR (nong dan)) thanh tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - nhanh lang ((cua nhung) OR (va nhung)) ((nong van) OR (nong dan)) thanh tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - nhanh lang ((cua nhung) or (va nhung)) ((nong van) OR (nong dan)) thanh tap".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - nhanh lang ((cua nhung) or (va nhung)) ((nong van) OR (nong dan)) thanh tap*.