Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
hanh tai » thanh tai, hang tai, han tai
tai cuu » tai cuc, tai buu, tai cua
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
cuu tre » cua tre, cau tren, cau treo
nang xa » nang x, lang xa, nang ma
va dao » ca dao

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 y) or (sach thu)) nang xa hoi. lieu ((va dau) OR (va dao)) truc va hanh tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach y) OR (sach thu)) nang xa hoi. lieu ((va dau) OR (va dao)) truc va hanh tai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach y) or (sach thu)) nang xa hoi. lieu ((va dau) OR (va dao)) truc va hanh tai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach y) or (sach thu)) nang xa hoi. lieu ((va dau) OR (va dao)) truc va hanh tai cuu tre*.