Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
dua tren » dung tren
truc va » thuc va, thuc vat, trung va
sach tu » sach thu, cach tu, sach ty
cuu tre » cua tre, cau tren, cau treo
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
tu nang » tru nang, tu nong, tu nano
tuc va » thuc va, tuc xa, duc va
x hoi » xa hoi, o hoi, x ho

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: thu sach tu nang x hoi. hieu ve cham ((tuc va) OR (truc va)) hanh vi ((dua tren) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach tu nang x hoi. hieu ve cham ((tuc va) OR (truc va)) hanh vi ((dua tren) or (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: thu sach tu nang x hoi. hieu ve cham ((tuc va) OR (truc va)) hanh vi ((dua tren) or (cuu tre))*.