Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van ban
te sach » toc sach
sach ky » sac ky, sach y, sach ty
vai cua » dai cua, hai cua, lai cua
van anh » van thanh, tuan anh, van minh
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang xa » lang xa, nang ma, mang xa
ve ca » ve cac, ve cai, ve cau
ca o » co o, va o

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) or (nang x)) hoi. hieu ve ca o ((van hanh) or (van anh)) vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang xa) OR (nang x)) hoi. hieu ve ca o ((van hanh) OR (van anh)) vai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang xa) or (nang x)) hoi. hieu ve ca o ((van hanh) or (van anh)) vai cua tre*.