Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
ban hanh » ban hang
cua tre » cua te, cuu tre, cua triet
ve pham » vi pham, v pham, ve phat
duc ban » duc tan, duc van, dua ban
ve phan » va phan, ke phan, ve phat
nang xa » nang x, lang xa, nang ma
tang ma » mang may, tang van
sac ky » cac ky, sai ky
su sac » su sach, su cac, su xac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky ((nang xa) or (tang ma)) hoi. hieu ((ve pham) OR (ve phan)) duc ban hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky ((nang xa) OR (tang ma)) hoi. hieu ((ve pham) OR (ve phan)) duc ban hanh dai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky ((nang xa) or (tang ma)) hoi. hieu ((ve pham) OR (ve phan)) duc ban hanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: su sac ky ((nang xa) or (tang ma)) hoi. hieu ((ve pham) OR (ve phan)) duc ban hanh dai cua tre*.