Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thu sach » tu sach, thuat sach, thuoc sach
danh lai » danh sai, gianh lai, dinh lam
van tham » van tuan, van chat, van thu
lai cua » dai cua, hai cua, lai chau
va danh » va dinh, va dan, va hanh
van tai » von tai, van tuan
sach ty » sach y, sach tu, sach thu
cao hoc » co hoc, cho hoc, chat hoc
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty nang cao hoc. thi ((((van tham) OR (van tai))) or (van thanh)) xuc va danh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang cao hoc. thi ((((van tham) OR (van tai))) OR (van thanh)) xuc va danh lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty nang cao hoc. thi ((((van tham) OR (van tai))) or (van thanh)) xuc va danh lai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang cao hoc. thi ((((van tham) OR (van tai))) or (van thanh)) xuc va danh lai cua tre*.