Perhaps you should try some spelling variations:
truong doi » truong dai, trong doi, truong hoi
xa truong » cac truong
so sach » so sanh, bo sach, co sach
ty nang » ky nang, ty xang, ty hang
cua tre » cuu tre, cua triet, dua tren
hieu va » lieu va, hieu qua
cac tuc » cac tu, cac tac, cac nuoc
sach ty » sach y, sach tu, sach thu
cac toc » cac toi, cac nuoc, cac thoi
cua te » cua tu
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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 o hoi. hieu va ((cac tuc) OR (cac toc)) xa truong doi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang o hoi. hieu va ((cac tuc) OR (cac toc)) xa truong doi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty nang o hoi. hieu va ((cac tuc) OR (cac toc)) xa truong doi ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: so sach ty nang o hoi. hieu va ((cac tuc) OR (cac toc)) xa truong doi ((cua tre) or (cua te))*.