Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
y nang » ly nang, may nang, day nang
v nang » va nang, vu nang, van nang
ve cac » va cac, vien cac
cac tu » cac thu, cach tu, cac du

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 ((((y nang) OR (ky nang))) or (v nang)) xa hoi. hieu ve cac tu va hanh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((((y nang) OR (ky nang))) OR (v nang)) xa hoi. hieu ve cac tu va hanh vai cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((((y nang) OR (ky nang))) or (v nang)) xa hoi. hieu ve cac tu va hanh vai cua viet*".