Perhaps you should try some spelling variations:
kham chua » kham pha
kham cuu » cham cuu, khao cuu, kham cuoc
hieu vu » hieu va, hieu ve, hieu su
nang xa » nang x, lang xa, nang ma
sach v » sach va, sach 2, sach vay
dao du » dao duc, dao duy, dao do
du cua » duy cua, dau cua, dum cua
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 v) OR (sach y)) nang xa hoi. hieu vu ((kham cuu) OR (kham chua)) de dao du cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach v) or (sach y)) nang xa hoi. hieu vu ((kham cuu) OR (kham chua)) de dao du cua te~".
• Adding a wildcard symbol may retrieve word variants: te ((sach v) or (sach y)) nang xa hoi. hieu vu ((kham cuu) OR (kham chua)) de dao du cua te*.