Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hieu van » hieu va, thien van, lieu va
sach ty » sach y, sach tu, sach thu
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
cac dai » cac dan, cac bai, can dai
tu sach » thu sach, su sach, te sach
nang co » nang cao, nang doc, nang noi
ty nang » ky nang, ty xang, ty hang
cac dac » cac dan, cac bac, cac tac
co hoi » co hoc, co loi
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang co hoi. hieu van ((cac dac) OR (cac dai)) va danh vi cua viet~.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang co hoi. hieu van ((cac dac) or (cac dai)) va danh vi cua viet*.