Perhaps you should try some spelling variations:
khai cua » thai cua, hai cua, khi cua
dan khai » dang khai, van khai, dang khoi
te sach » toc sach
cac luc » cau luc, coc luc, cac nuoc
nang xa » nang x, lang xa, mang xa
nang ma » sang ma, nang cao, mang may
tang ma » mang may, tang van
sach ky » sac ky, sach y, sach ty
qua cac » cua cac
va dan » ca dan, va dao, va dau
luc va » duc va, tuc va, loc va
cua te » cua tu

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: te sach ky ((nang xa) OR (((nang ma) OR (tang ma)))) hoi. hieu qua cac luc va dan khai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang xa) or (((nang ma) OR (tang ma)))) hoi. hieu qua cac luc va dan khai cua te~".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang xa) or (((nang ma) OR (tang ma)))) hoi. hieu qua cac luc va dan khai cua te*.