Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
hieu van » hieu va, thien van, lieu va
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
danh di » danh du, xanh di, danh dien
su sach » so sach, vu sach
van cac » van hac, van cau, van bac
nang ma » tang ma, sang ma, nang cao
tuc va » truc va, tuc xa, duc va
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang ma hoi. hieu van cac ((tuc va) or (thuc va)) danh di ((cua tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang ma hoi. hieu van cac ((tuc va) OR (thuc va)) danh di ((cua tre) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: su sach y nang ma hoi. hieu van cac ((tuc va) or (thuc va)) danh di ((cua tre) or (cau treo))*.