Perhaps you should try some spelling variations:
luoc van » luoc can, luoc va, luot van
sach ky » sac ky, sach y, sach kem
tuan te » tuan le, tuan ts, tuan tu
luc van » luu van, duc van, luc va
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
te cua » tue cua, le cua, de cua
va cam » va cham, va cac, va cao

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) OR (sach ty)) nang xa hoi. hieu va cam ((luc van) OR (luoc van)) tuan te cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sach ty)) nang xa hoi. hieu va cam ((luc van) OR (luoc van)) tuan te cua tre~".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sach ty)) nang xa hoi. hieu va cam ((luc van) OR (luoc van)) tuan te cua tre*.