Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
van cam » van nam, van lam, van dam
van cau » van dau, van hau, van chat
lang xa » lang ha, dang xay, lang van
xuc va » duc va, tuc va, luc va
cua te » cua tu

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) or (toc sach)) _ lang xa hoi. thien ((van cam) OR (van cau)) xuc va hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) _ lang xa hoi. thien ((van cam) OR (van cau)) xuc va hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) _ lang xa hoi. thien ((van cam) OR (van cau)) xuc va hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) _ lang xa hoi. thien ((van cam) OR (van cau)) xuc va hanh vai cua te*.