Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
thanh va » thanh van, thanh ha, thanh ve
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
vu khac » vu kham, vu khanh, bui khac
cham oc » cham soc, cham o, cham hoi
hanh va » hang va, hanh vi
tu sach » thu sach, su sach, te sach
nang o » nang co, nang ho, nang ro
y nang » ky nang, ly nang, v nang
oc van » hoc van, luoc van, quoc van
o hoi » co hoi, o hoc, o hai

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 (vu khac)) y nang o hoi. hieu van cham oc van ((thanh va) OR (hanh va)) cua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (vu khac)) y nang o hoi. hieu van cham oc van ((thanh va) OR (hanh va)) cua viet~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (vu khac)) y nang o hoi. hieu van cham oc van ((thanh va) OR (hanh va)) cua viet*.