Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
hanh tai » thanh tai, hang tai, han tai
may khoa » da khoa, ly khoa, y khoa
van hanh » van thanh, ban hanh, van anh
xuc van » duc van, luc van, vuc van
cuu tre » cua tre, cau tren
te sach » toc sach
hieu va » lieu va, hieu qua
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
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) OR (ky tang)) may khoa. hieu va cam xuc van hanh tai ((cuu tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky lang) OR (ky tang)) may khoa. hieu va cam xuc van hanh tai ((cuu tre) OR (cau treo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky lang) OR (ky tang)) may khoa. hieu va cam xuc van hanh tai ((cuu tre) or (cau treo))".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky lang) OR (ky tang)) may khoa. hieu va cam xuc van hanh tai ((cuu tre) or (cau treo))*.