Perhaps you should try some spelling variations:
truong doi » truong dai, trong doi, truong hoi
cua triet » cua viet, su triet, va triet
xa truong » cac truong
cay thuc » cay thuoc, can thuc, day thuc
nay thuc » nam thuc, day thuc, nhan thuc
cuu tre » cua tre, cau tren, cau treo
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
ty nang » ky nang, ty xang, ty hang
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: so sach ty nang x hoi. hieu va ((nay thuc) OR (cay thuc)) xa truong doi ((cuu tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang x hoi. hieu va ((nay thuc) OR (cay thuc)) xa truong doi ((cuu tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty nang x hoi. hieu va ((nay thuc) OR (cay thuc)) xa truong doi ((cuu tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: so sach ty nang x hoi. hieu va ((nay thuc) OR (cay thuc)) xa truong doi ((cuu tre) or (cua triet))*.