Perhaps you should try some spelling variations:
thuoc sach » nuoc sach, thuat sach, thuoc sinh
van hanh » van thanh, ban hanh, van anh
hoc sach » hoc sinh, hoc cac, hoc anh
pham huu » pham duc, pham duy, phan huy
chat xuc » chat huu, cam xuc, chao xu
hieu ve » hieu va, hieu van
song xa » song cua
ty song » tay song, ta song, ty dong
cua tre » cua te, cuu tre, cua triet
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 (hoc sach)) ty song xa hoi. hieu ve ((chat xuc) or (pham huu)) van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (hoc sach)) ty song xa hoi. hieu ve ((chat xuc) OR (pham huu)) van hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) OR (hoc sach)) ty song xa hoi. hieu ve ((chat xuc) or (pham huu)) van hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) OR (hoc sach)) ty song xa hoi. hieu ve ((chat xuc) or (pham huu)) van hanh vi cua tre*.