Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
vat thanh » dat thanh, gat thanh, tat thanh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
va cham » va chat, va tham
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: te sach ky lang xa hoi. hieu ((va cham) or (va cao)) thuc vat thanh dai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang xa hoi. hieu ((va cham) OR (va cao)) thuc vat thanh dai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang xa hoi. hieu ((va cham) or (va cao)) thuc vat thanh dai ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. hieu ((va cham) or (va cao)) thuc vat thanh dai ((cua tre) OR (cuu tre))*.