Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hai truc » dai truc, hai trac, hang truc
ban hang » ngan hang
vai cua » dai cua, hai cua, lai cua
cach tu » cach thuc
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
sach tu » sach thu, sach ty, sach uu
va hai » van hai, va chai, va khai
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach tu) or (cach tu)) lang xa hoi. hieu va hai truc ((ban hang) or (van hanh)) vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach tu) OR (cach tu)) lang xa hoi. hieu va hai truc ((ban hang) OR (van hanh)) vai cua te.
• Adding a wildcard symbol may retrieve word variants: su ((sach tu) or (cach tu)) lang xa hoi. hieu va hai truc ((ban hang) or (van hanh)) vai cua te*.