Perhaps you should try some spelling variations:
thanh trua » thanh tra, thanh trung, thanh thuy
trua cua » tru cua, trung cua, qua cua
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
truc va » thuc va, thuc vat, trung va
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
x hoi » xa hoi, x ho, 5 hoi
o hoi » co hoi, o hoc, o hai

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((x hoi) OR (o hoi)). hieu va cam ((truc va) OR (duc va)) thanh trua cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((x hoi) OR (o hoi)). hieu va cam ((truc va) OR (duc va)) thanh trua cua tre*.