Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
tinh voi » trinh voi, tinh doi, binh voi
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
cua tre » cuu tre, cua triet, dua tren
va tinh » may tinh
van cau » van dau, van hau, van chat
cau xuc » cam xuc, cau luc, cau truc
nang xa » nang x, lang xa, nang ma
xuc va » duc va, tuc va, luc va
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach thu ((nang xa) or (nang cao)) hoi. hieu van cau xuc va tinh voi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu ((nang xa) OR (nang cao)) hoi. hieu van cau xuc va tinh voi ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: su sach thu ((nang xa) or (nang cao)) hoi. hieu van cau xuc va tinh voi ((cua tre) or (cua te))*.