Perhaps you should try some spelling variations:
thanh cua » tranh cua, than cua, hanh cua
cua viet » ca viet, hoa viet, cua dieu
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
luc va » duc va, tuc va
loc va » hoc va
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach v nang xa hoi. hieu ve cham ((luc va) OR (loc va)) thanh cua ((cua viet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v nang xa hoi. hieu ve cham ((luc va) OR (loc va)) thanh cua ((cua viet) OR (cua vat)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach v nang xa hoi. hieu ve cham ((luc va) OR (loc va)) thanh cua ((cua viet) or (cua vat))".
• Adding a wildcard symbol may retrieve word variants: su sach v nang xa hoi. hieu ve cham ((luc va) OR (loc va)) thanh cua ((cua viet) or (cua vat))*.