Perhaps you should try some spelling variations:
danh tai » doanh tai, dinh tai, hanh tai
hoc sach » hoc sinh, hoc cac, hoc anh
co sach » cuon sach
tai cua » thai cua, tai cuc, tri cua
va danh » va dinh, va dan, va hanh
cac tuc » cac toc, cac tu, cac tac
hieu va » lieu va, hieu qua
hang xa » hoang xa, hang va, hang ca
ly hang » ly quang
cua tre » cua te, cuu tre, cua triet
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((co sach) or (((bo sach) OR (hoc sach)))) ly hang xa hoi. hieu va cac tuc va danh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((co sach) OR (((bo sach) OR (hoc sach)))) ly hang xa hoi. hieu va cac tuc va danh tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((co sach) or (((bo sach) OR (hoc sach)))) ly hang xa hoi. hieu va cac tuc va danh tai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((co sach) or (((bo sach) OR (hoc sach)))) ly hang xa hoi. hieu va cac tuc va danh tai cua tre*.