Perhaps you should try some spelling variations:
hang tai » hang va, dung tai
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, te sach, tu cach
tai cua » thai cua, tai cuc, tri cua
xa hang » va hang, xa bang, xa hung
cam tuc » cam xuc, cam tu, nam thuc
van cam » van nam, van lam, van cau
cua tre » cua te, cuu tre, cua triet
mang xa » lang xa, mang may, dang xay
su sach » so sach, vu sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (su sach)) ky ((mang xa) or (nang x)) hoi. hieu van cam tuc xa hang tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky ((mang xa) OR (nang x)) hoi. hieu van cam tuc xa hang tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ky ((mang xa) or (nang x)) hoi. hieu van cam tuc xa hang tai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ky ((mang xa) or (nang x)) hoi. hieu van cam tuc xa hang tai cua tre*.