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

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