Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
cuu tre » cau tren, cau treo
truc va » thuc va, thuc vat, trung va
cua tre » cua te, cua triet, dua tren
sach ky » sac ky, sach y, sach ty
va tham » van tham, va cham, va thuat
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
va cao » va cac, va co, va dao

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