Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
so sach » so sanh, bo sach, co sach
dai cuu » dai cua, dai huu
va hanh » van hanh, va thanh, va danh
qua cac » cua cac
qua cam » qua cham, qua ca, qua cai
nang xa » lang xa, nang ma, mang xa
sach ty » sach y, sach tu, sach thu
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty ((nang xa) or (nang x)) hoi. hieu ((qua cam) or (qua cac)) duc va hanh dai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty ((nang xa) OR (nang x)) hoi. hieu ((qua cam) OR (qua cac)) duc va hanh dai cuu tre.
• Adding a wildcard symbol may retrieve word variants: so sach ty ((nang xa) or (nang x)) hoi. hieu ((qua cam) or (qua cac)) duc va hanh dai cuu tre*.