Perhaps you should try some spelling variations:
lang may » mang may, bang may, lang mai
may khoa » da khoa, ly khoa, y khoa
van hanh » van thanh, ban hanh, van anh
hanh tai » thanh tai, hang tai, han tai
cau theo » cau thi, cau tao
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
cuu tre » cua tre, cau tren, cau treo
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 theo))~.
• 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 theo)).
• 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 theo))*.