Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
cau tren » cu tren, dau tren, ca tren
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
cua tre » cua te, cuu tre, cua triet
v nang » va nang, vu nang, van nang
xuc va » duc va, tuc va, xac va
sach v » sach va, sach y, sach 2
luc va » duc va, tuc va, loc va
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach v nang x hoi. hieu ve chat ((xuc va) or (luc va)) hanh vi ((cua tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach v nang x hoi. hieu ve chat ((xuc va) OR (luc va)) hanh vi ((cua tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: thu sach v nang x hoi. hieu ve chat ((xuc va) or (luc va)) hanh vi ((cua tre) or (cau tren))*.