Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
lang cac » bang cac, hang cac, dang cac
cac khoi » cac thoi, cac khoan, cach thoi
hieu van » hieu va, thien van, lieu va
hanh tai » thanh tai, hang tai, han tai
cuu tre » cua tre, cau tren
tu sach » thu sach, su sach, te sach
luc van » luoc van, luu van, duc van
sach ky » sac ky, sach y, sach ty
xuc van » duc van, vuc van, xuc ban
van cam » van nam, van lam, van cau
ky lang » ky nang, ky dang, ky tang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky lang cac khoi. hieu van cam ((xuc van) or (luc van)) hanh tai ((cuu tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang cac khoi. hieu van cam ((xuc van) OR (luc van)) hanh tai ((cuu tre) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang cac khoi. hieu van cam ((xuc van) or (luc van)) hanh tai ((cuu tre) or (cau treo))*.