Perhaps you should try some spelling variations:
hien cac » thien cac, vien cac, dien cac
hieu cac » hieu luc, hieu va, hieu van
hanh lai » hanh lam, hanh tai, thanh lap
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
lai cua » dai cua, hai cua, lai chau
cua te » cua tu
lo va » lo van, lao va, ly va

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 ky nang xa hoi. hieu ((hien cac) or (hieu cac)) lo va hanh lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu ((hien cac) OR (hieu cac)) lo va hanh lai cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu ((hien cac) or (hieu cac)) lo va hanh lai cua te*.