Perhaps you should try some spelling variations:
tranh nghiem » trac nghiem, trach nhiem, trinh nghien
trai nghiem » trac nghiem, thi nghiem
thuoc khac » thuc khac, thuoc khang, hoc khac
hanh tranh » canh tranh, hanh trinh, hanh trang
nghiem te » nghiem de, nghiem ve, nghiem tien
nhiet hoc » triet hoc, nhiet doi
de hoc » du hoc, dien hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thuoc khac trai nghiem te hoc ) or ( thuc hanh tranh nghiem ((de hoc) or (nhiet hoc)) ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thuoc khac trai nghiem te hoc ) OR ( thuc hanh tranh nghiem ((de hoc) OR (nhiet hoc)) )).
• Adding a wildcard symbol may retrieve word variants: (( thuoc khac trai nghiem te hoc ) or ( thuc hanh tranh nghiem ((de hoc) or (nhiet hoc)) ))*.