Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
toc sach » hoc sach, doc sach, thuoc sach
chat xuc » chat huu, cam xuc, chao xu
thai cua » than cua, tai cuc, tri cua
van hanh » ban hanh, van anh, van ban
ve chat » va chat, van chat
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
ty sang » ty xang, ty hang, duy sang
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ty sang ((ma hoa) or (xa hoi)). hieu ve chat xuc ((van hanh) OR (van thanh)) thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty sang ((ma hoa) OR (xa hoi)). hieu ve chat xuc ((van hanh) OR (van thanh)) thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty sang ((ma hoa) or (xa hoi)). hieu ve chat xuc ((van hanh) OR (van thanh)) thai cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ty sang ((ma hoa) or (xa hoi)). hieu ve chat xuc ((van hanh) OR (van thanh)) thai cua tre*.