Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh mang » nhanh mang, hanh trang, nhanh lang
hang nong » thang long, han tong
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
nong dan » cong dan, nong san, nguong dan
toan cao » toan tap
toan ban » van ban
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu sach - ((hanh mang) or (hanh trinh)) va hang nong dan ((toan cao) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - ((hanh mang) OR (hanh trinh)) va hang nong dan ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu sach - ((hanh mang) or (hanh trinh)) va hang nong dan ((toan cao) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: theo chu sach - ((hanh mang) or (hanh trinh)) va hang nong dan ((toan cao) OR (toan ban))*.