Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
van thanh » ban thanh, van tuan
lang van » dang van, tang van, hoang van
truc van » truc va, thuc van, truc ban
cam truc » cau truc, nam truc, lam truoc
van hoc » van hoa
hieu va » lieu va, hieu qua
vu khac » vu kham, vu khanh, bui khac
ky lang » ky nang, ky dang, ky tang
te sach » toc sach
tu cach » tu cac
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((vu khac) or (tu cach))) or (te sach)) ky lang van hoc. hieu va cam truc van thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((vu khac) OR (tu cach))) OR (te sach)) ky lang van hoc. hieu va cam truc van thanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((((vu khac) or (tu cach))) or (te sach)) ky lang van hoc. hieu va cam truc van thanh dai cua tre*.