Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van chat » cao chat
tu sach » thu sach, su sach, te sach
tai cua » thai cua, tai cuc, tri cua
han tai » hang tai, nhan tai, van tai
va chat » va phat, cao chat, hoa chat
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa
va han » va phan, van han, va hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (toc sach)) ky dang xa hoi. lieu ((va chat) OR (van chat)) tuc va han tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (toc sach)) ky dang xa hoi. lieu ((va chat) OR (van chat)) tuc va han tai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (toc sach)) ky dang xa hoi. lieu ((va chat) OR (van chat)) tuc va han tai cua tre*".