Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
te sach » toc sach
nang xa » lang xa, nang ma, mang xa
qua cac » cua cac
cac luc » cau luc, coc luc, cac nuoc
luc va » duc va, tuc va, loc va
va dan » ca dan, va dao, va dau
dan va » doan va, dan ca, ban va
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y ((nang xa) or (nang x)) hoi. hieu qua cac luc va dan va cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang xa) OR (nang x)) hoi. hieu qua cac luc va dan va cua viet.
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang xa) or (nang x)) hoi. hieu qua cac luc va dan va cua viet*.