Perhaps you should try some spelling variations:
mot bien » vat bien, so bien
van hanh » van thanh, ban hanh, van anh
cham duc » pham duc, cham soc, pham duy
su tien » su kien, su hien, tu tieng
duc van » duc va, duc tan, duc manh
sach ty » sach y, sach tu, sach thu
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
nang xa » lang xa, nang ma, mang xa
ve cham » va cham, ve chat, vu cham

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty ((nang xa) or (nang x)) hoi. hieu ve cham duc van hanh vi ((su tien) or (mot bien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (nang x)) hoi. hieu ve cham duc van hanh vi ((su tien) OR (mot bien)).
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang xa) or (nang x)) hoi. hieu ve cham duc van hanh vi ((su tien) or (mot bien))*.