Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
van hanh » van thanh, ban hanh, van anh
hanh vai » hanh vi, hanh va, hanh tai
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
vai cua » dai cua, hai cua, lai cua
cua te » cua tu
x hoi » xa hoi, o hoi, x ho
da vo » da voi, dat vo, va vo

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 x hoi. hieu vien ((da vo) or (dat va)) van hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. hieu vien ((da vo) OR (dat va)) van hanh vai cua te.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu vien ((da vo) or (dat va)) van hanh vai cua te*.