Perhaps you should try some spelling variations:
day cua » dai cua
vu kham » vu khanh
sach ky » sac ky, sach y, sach kem
hieu vu » hieu va, hieu ve, hieu su
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, duc va

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 ky) or (sach ty)) nang xa hoi. hieu vu kham ((tuc va) OR (tuc xa)) da day cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach ty)) nang xa hoi. hieu vu kham ((tuc va) OR (tuc xa)) da day 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 vu kham ((tuc va) OR (tuc xa)) da day cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sach ty)) nang xa hoi. hieu vu kham ((tuc va) OR (tuc xa)) da day cua tre*.