Perhaps you should try some spelling variations:
thieu nien » thien nhien
nien cac » vien cac, dien cac, bien cac
van hanh » van thanh, ban hanh, van anh
ban hang » ngan hang
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » lang xa, nang ma, mang xa
lai cua » dai cua, hai cua, lai chau
cac vo » cac co, cac vi, cac bo
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 ky ((nang xa) or (nang x)) hoi. thieu nien cac vo ((van hanh) or (ban hang)) lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang xa) OR (nang x)) hoi. thieu nien cac vo ((van hanh) OR (ban hang)) lai cua te.
• Adding a wildcard symbol may retrieve word variants: su sach ky ((nang xa) or (nang x)) hoi. thieu nien cac vo ((van hanh) or (ban hang)) lai cua te*.