Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
tu sach » thu sach, su sach, tu cach
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va
loc va » hoc va
dau ca » dau cay, dau cua, dan ca
ca cua » co cua

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 (te sach)) y nang xa hoi. hieu vu cham ((luc va) OR (loc va)) dau ca cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) y nang xa hoi. hieu vu cham ((luc va) OR (loc va)) dau ca cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) y nang xa hoi. hieu vu cham ((luc va) OR (loc va)) dau ca cua viet*".