Perhaps you should try some spelling variations:
hien cac » thien cac, vien cac, dien cac
hieu cac » hieu luc, hieu va, hieu van
hanh vai » hanh vi, hanh va, hanh tai
su sach » so sach, vu 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
vai cua » dai cua, hai cua, lai cua
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: su sach ky nang xa hoi. hieu ((hien cac) OR (hieu cac)) lo va hanh vai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu ((hien cac) OR (hieu cac)) lo va hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu ((hien cac) OR (hieu cac)) lo va hanh vai cua te*.