Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
cuu tre » cua tre, cau tren
dan vai » dan va, dan tai, dan vat
vat dan » va dan, van dan, vat ran
toc sac » toc sach, toc san, hoc sach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
va nam » van nam, ha nam
va nay » va ngay, va cay

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sac ky lang xa hoi. hieu ((va nam) or (va nay)) thuc vat dan vai ((cuu tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky lang xa hoi. hieu ((va nam) OR (va nay)) thuc vat dan vai ((cuu tre) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: toc sac ky lang xa hoi. hieu ((va nam) or (va nay)) thuc vat dan vai ((cuu tre) or (cau treo))*.