Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
va thanh » gia thanh, ban thanh, va tinh
thanh di » thanh doi, thanh de, thanh do
nam thuc » nam thuoc, am thuc, nam thu
hieu van » hieu va, thien van, lieu va
nam xuc » cam xuc, nam xua, nam duoc
sach ky » sac ky, sach y, sach ty
cuu tre » cua tre, cau tren
su sach » so sach, vu sach
x hoi » xa hoi, o hoi, x ho

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 ky nang x hoi. hieu van ((nam xuc) OR (nam thuc)) va thanh di ((cuu tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. hieu van ((nam xuc) OR (nam thuc)) va thanh di ((cuu tre) OR (cau treo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. hieu van ((nam xuc) OR (nam thuc)) va thanh di ((cuu tre) or (cau treo))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu van ((nam xuc) OR (nam thuc)) va thanh di ((cuu tre) or (cau treo))*.