Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
van hanh » ban hanh, van anh, van ban
cao xuc » cam xuc, cao duc, cao suc
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
sach tu » sach thu, cach tu, sach ty
va cao » va cac, va co, va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach y) or (sach tu)) lang xa hoi. hieu va cao xuc ((van hanh) or (van thanh)) lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach y) OR (sach tu)) lang xa hoi. hieu va cao xuc ((van hanh) OR (van thanh)) lai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach y) or (sach tu)) lang xa hoi. hieu va cao xuc ((van hanh) or (van thanh)) lai cua tre*.