Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
cua viet » ca viet, hoa viet, cua vat
thu sach » thuat sach, thuoc sach, thu hoach
can nuoc » cap nuoc, cac nuoc, can cuoc
viec can » viec ban, vien can, view can
lai hoa » dai hoa, loai hoc
va hanh » van hanh, va thanh, va danh
tu sach » su sach, te sach, tu cach
mai hoi » mai khoi, dai hoi, lai hoi
ty nang » ky nang, ty xang, ty hang
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) OR (thu sach)) ty nang ((mai hoi) OR (lai hoa)). hieu viec can nuoc va hanh vi cua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ty nang ((mai hoi) or (lai hoa)). hieu viec can nuoc va hanh vi cua viet~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ty nang ((mai hoi) or (lai hoa)). hieu viec can nuoc va hanh vi cua viet*.