Perhaps you should try some spelling variations:
te sach » toc sach
thuc va » thuc vat, thuc dan, thuc day
sach ky » sac ky, sach y, sach ty
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va, hieu van
tuc va » truc va, tuc xa, duc va
vi cuu » vi luu, vinh cuu
ve cam » ve cham, ve cac, va cam
o hoi » co hoi, o hoc, o hai

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 nang ((xa hoi) or (o hoi)). hieu ve cam ((tuc va) or (thuc va)) hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((xa hoi) OR (o hoi)). hieu ve cam ((tuc va) OR (thuc va)) hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((xa hoi) or (o hoi)). hieu ve cam ((tuc va) or (thuc va)) hanh vi cuu tre*.