Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tai khoa » da khoa, noi khoa
phat xuc » chat xuc, phat xuat, phap xu
van hanh » van thanh, ban hanh, van anh
dang ha » dong ha, dung ha, tang ha
lang ha » long ha
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
cua tre » cua te, cuu tre, dua tren

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu tai khoa ((dang ha) or (lang ha)) hoi. hieu va phat xuc van hanh vi ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu tai khoa ((dang ha) OR (lang ha)) hoi. hieu va phat xuc van hanh vi ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu tai khoa ((dang ha) or (lang ha)) hoi. hieu va phat xuc van hanh vi ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu tai khoa ((dang ha) or (lang ha)) hoi. hieu va phat xuc van hanh vi ((cua tre) OR (cua triet))*.