Perhaps you should try some spelling variations:
toan nghiem » trai nghiem, van nghiem, doanh nghiep
hoach toan » hach toan
khanh trac » khanh trach, khanh tra, thanh tra
nghiem te » nghiem ve, nghiem tien, nghiem tren
thu khanh » thi khanh, nhu khanh, thu thanh
nghiem de » nghiem d, nghiem do, nghiem ve
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: (( thu hoach toan nghiem te hoc ) or ( thu khanh trac nghiem de hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu hoach toan nghiem te hoc ) OR ( thu khanh trac nghiem de hoc ))*.