Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua dieu
thu sach » thuat sach, thuoc sach, thu hoach
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
tu sach » su sach, te sach, tu cach
ve cham » va cham, ve chat, vu cham
cham oc » cham soc, cham o, cham hoi
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
oc van » hoc van, luoc van, quoc van
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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) or (thu sach)) ty nang o hoi. hieu ve cham oc van hanh lai ((cua viet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty nang o hoi. hieu ve cham oc van hanh lai ((cua viet) OR (cua vat)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ty nang o hoi. hieu ve cham oc van hanh lai ((cua viet) or (cua vat))*.