Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
hanh hai » nhanh hai, hang hai, hanh tai
cua tre » cua te, cuu tre, cua triet
duc ban » duc tan, duc van, dua ban
ve pham » vi pham, v pham, ve phan
nang xa » lang xa, nang ma, mang xa
hieu ve » hieu va, hieu 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 (nang x)) hoi. hieu ve pham duc ban ((hanh hai) OR (thanh hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky ((nang xa) OR (nang x)) hoi. hieu ve pham duc ban ((hanh hai) OR (thanh hai)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky ((nang xa) or (nang x)) hoi. hieu ve pham duc ban ((hanh hai) OR (thanh hai)) cua tre*".