Perhaps you should try some spelling variations:
thuoc sach » hoc sach, thuat sach, thuoc sinh
nuoc sach » nguoi sach, hoc sach, cuoc cach
hieu thi » sieu thi, hieu chi, hiep thi
tay lang » tai lang, tay tang, tay quang
lang xa » lang ha, dang xay, lang van
chao su » chao xu, achat su, chao chu
van anh » van thanh, tuan anh, van minh
cua tre » cua te, cuu tre, cua triet
anh vi » hanh vi, anh va, anh ve
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) or (nuoc sach)) tay lang xa hoi. hieu thi ((chao su) OR (cao su)) van anh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (nuoc sach)) tay lang xa hoi. hieu thi ((chao su) OR (cao su)) van anh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) or (nuoc sach)) tay lang xa hoi. hieu thi ((chao su) OR (cao su)) van anh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (nuoc sach)) tay lang xa hoi. hieu thi ((chao su) OR (cao su)) van anh vi cua tre*.