Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
hang tai » hang va, dung tai
sach ky » sac ky, sach ty, sach kem
hai cuu » hai cua, hai chu, hai cuc
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va, hieu van
tai hoi » tai khoi, dai hoi, tai hai
tuc va » thuc va, truc va, tuc xa
loc va » hoc va, luc va
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ky) or (sach y)) hang tai hoi. hieu ve cac ((tuc va) or (loc va)) hanh hai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach y)) hang tai hoi. hieu ve cac ((tuc va) OR (loc va)) hanh hai cuu tre.
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sach y)) hang tai hoi. hieu ve cac ((tuc va) or (loc va)) hanh hai cuu tre*.