Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
van tham » van tuan, van chat, van tai
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cao hoi » cau hoi, co hoi, cao hoc
va hanh » van hanh, va thanh, va danh
hai cua » thai cua, hoi cua, lai cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang cao hoi. thien ((van tham) or (van thanh)) duc va hanh ((hai cua) OR (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang cao hoi. thien ((van tham) OR (van thanh)) duc va hanh ((hai cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang cao hoi. thien ((van tham) or (van thanh)) duc va hanh ((hai cua) OR (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang cao hoi. thien ((van tham) or (van thanh)) duc va hanh ((hai cua) OR (dai cua)) tre*.