Perhaps you should try some spelling variations:
tay quang » tac quang, tai quang, tao quang
toc sach » hoc sach, doc sach, thuoc sach
van tham » van thanh, van tuan, van chat
van phat » va phat, van chat, van phan
tay lang » tai lang, tay tang, tham lang
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
doc va » duoc va, hoc va, duc va
vi cua » vai cua, di cua

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 ((tay lang) OR (tay quang)) xa hoi. hieu ((van phat) or (van tham)) doc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((tay lang) OR (tay quang)) xa hoi. hieu ((van phat) OR (van tham)) doc va hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((tay lang) OR (tay quang)) xa hoi. hieu ((van phat) or (van tham)) doc va hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ((tay lang) OR (tay quang)) xa hoi. hieu ((van phat) or (van tham)) doc va hanh vi cua tre*.