Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cua viet » ca viet, hoa viet, cua vat
thanh va » thanh van, hanh va, thanh ha
vu cham » va cham, vu kham, tu cham
tu sach » thu sach, su sach, te sach
vu khac » vu kham, vu khanh, bui khac
ve cham » va cham, ve chat, ve chim
nang o » nang co, nang ho, nang ro
y nang » ky nang, ly nang, v nang
oc van » hoc van, luoc van, quoc van
va cua » va chua, via cua, ca cua
o hoc » co hoc, mo hoc, so hoc

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