Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
truc va » thuc va, thuc vat, trung va
cua tre » cua te, cuu tre, cua triet
hang xa » hoang xa, hang va, hang ca
ty hang » ly hang, ty xang, thi hang
va cao » va cac, va co, va dao
va cam » va cham, va cac, va cai

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)) ty hang xa hoi. hieu ((va cam) or (va cao)) truc va thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ty hang xa hoi. hieu ((va cam) OR (va cao)) truc va thanh dai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ty hang xa hoi. hieu ((va cam) or (va cao)) truc va thanh dai cua tre*".