Perhaps you should try some spelling variations:
nhan tuc » nhan thuc, nhan luc, nhanh thuc
sach vay » sach va, sach hay, sach nay
doan vi » doan va, don vi, doan thi
hieu vu » hieu va, hieu ve, hieu su
vu nhan » cu nhan, vu ngan, tu nhan
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, truc va, tuc xa
dan vi » don vi, dan va, gan vi
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 vay) OR (sach y)) nang ma hoi. hieu vu nhan tuc va ((dan vi) OR (doan vi)) cua te~.
• Adding a wildcard symbol may retrieve word variants: te ((sach vay) or (sach y)) nang ma hoi. hieu vu nhan tuc va ((dan vi) or (doan vi)) cua te*.