Perhaps you should try some spelling variations:
truong doi » truong dai, trong doi, truong moi
truong hoi » truong hoc, truong khoa, truong dai
cua tre » cuu tre, cua triet, dua tren
so sanh » do sanh
sanh ty » sach ty, canh tay
cac tuc » cac toc, cac tu, cac tac
hieu va » lieu va, hieu qua
ty nang » ky nang, ty xang, ty hang
nang o » nang co, nang ho, nang ro
cua te » cua tu
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 sanh ty nang o hoi. hieu va cac tuc xa ((truong doi) OR (truong hoi)) ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ty nang o hoi. hieu va cac tuc xa ((truong doi) OR (truong hoi)) ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh ty nang o hoi. hieu va cac tuc xa ((truong doi) OR (truong hoi)) ((cua tre) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: so sanh ty nang o hoi. hieu va cac tuc xa ((truong doi) OR (truong hoi)) ((cua tre) or (cua te))*.