Perhaps you should try some spelling variations:
xang dau » hang dau
anh tai » hanh tai, anh thai, vanh tai
cua tre » cuu tre, cua triet, dua tren
sach ty » sach y, sach tu, sach thu
dau hoi » cau hoi, dai hoi, dan hoi
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach kem
cau luc » cau truc, cau phuc
luc van » luoc van, luu van, duc van
van anh » van thanh, tuan anh, van minh
ve cau » ke cau, va cau, ve cac
cua te » cua tu

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 ty)) xang dau hoi. hieu ve cau luc van anh tai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach ty)) xang dau hoi. hieu ve cau luc van anh tai ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sach ty)) xang dau hoi. hieu ve cau luc van anh tai ((cua tre) or (cua te))*.