Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu ve » hieu va, hieu van
ve giao » te giao, viet giao, van giao
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, dua tren
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
nang o » nang co, nang ho, nang ro
o hai » co hai, so hai, o lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky nang o hai. hieu ve giao duc ((va hanh) or (may tinh)) dai ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky nang o hai. hieu ve giao duc ((va hanh) OR (may tinh)) dai ((cua tre) OR (cua triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky nang o hai. hieu ve giao duc ((va hanh) or (may tinh)) dai ((cua tre) OR (cua triet))*".