Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
cau treo » cau theo, cau triet, cau trieu
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
may khoa » da khoa, ly khoa, y khoa
lang may » mang may, bang may, lang mai
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
sach ky » sac ky, sach y, sach ty
cuu tre » cua tre
ky lang » ky nang, ky dang, ky tang
te sach » toc sach
va cam » va cham, va cac, va cao

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