Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
lang hai » lang chai, lang thai, lang ha
hai khoa » thai khoa, chai khoa, tai khoa
van dung » van dong, xay dung, tin dung
cuu tre » cua tre, cau tren
xuc van » duc van, luc van, vuc van
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
ve cac » va cac, vien cac
ve cam » ve cham, va cam, ve cai

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