Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
dan thai » dang thai, dan thi, dan than
cuu tre » cua tre, cau treo
te sach » toc sach
sach ky » sac ky, sach y, sach ty
van dau » phan dau
lang ha » long ha
ky lang » ky nang, ky dang, ky tang
va dan » ca dan, va dao, va dau
ha hoi » hoa hoi, ha noi, xa hoi

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 ha hoi. hieu ((van dau) or (van dao)) nuoc va dan thai ((cuu tre) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang ha hoi. hieu ((van dau) OR (van dao)) nuoc va dan thai ((cuu tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang ha hoi. hieu ((van dau) or (van dao)) nuoc va dan thai ((cuu tre) OR (cau tren))".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang ha hoi. hieu ((van dau) or (van dao)) nuoc va dan thai ((cuu tre) OR (cau tren))*.