Perhaps you should try some spelling variations:
cau theo » cau thi, cau tao
hanh tai » thanh tai, hang tai, han tai
mai khoa » tai khoa, may khoa, dai khoa
van hanh » van thanh, ban hanh, van anh
xuc van » duc van, luc van, vuc van
cuu tre » cua tre, cau tren, cau treo
te sach » toc sach
hieu ve » hieu va, hieu van
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
ve cam » ve cham, ve cac, va cam

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)) mai khoa. hieu ve 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) OR (ky tang)) mai khoa. hieu ve cam xuc van hanh tai ((cuu tre) OR (cau theo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky lang) OR (ky tang)) mai khoa. hieu ve cam xuc van hanh tai ((cuu tre) or (cau theo))".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky lang) OR (ky tang)) mai khoa. hieu ve cam xuc van hanh tai ((cuu tre) or (cau theo))*.