Perhaps you should try some spelling variations:
tranh nghiem » trac nghiem, trach nhiem, trinh nghien
dong nghiep » cong nghiep, nong nghiep, doanh nghiep
nghiem dien » nghiep dien, nghiem tien, nghiem tieng
hoach dong » hoach trong, hoat dong, hanh dong
sach tranh » canh tranh
nghiep te » nghiep ke, nghiep tu, nghiem te
dien hoc » dien hoa, khien hoc, tin hoc
tu sach » thu sach, su sach, te sach

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 dong nghiep te hoc ) or ( tu sach tranh nghiem dien hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu hoach dong nghiep te hoc ) OR ( tu sach tranh nghiem dien hoc )).
• Adding a wildcard symbol may retrieve word variants: (( thu hoach dong nghiep te hoc ) or ( tu sach tranh nghiem dien hoc ))*.