Perhaps you should try some spelling variations:
trinh nghiep » trinh nghien, trinh ghep, trinh nhiet
hanh trinh » canh tranh, hanh chinh
trinh nghe » trinh nghien, trinh he, trinh nha
nghiep vu » nghiep va
trinh thi » trinh tai, dinh thi, trinh tu
so hanh » so sanh, so danh, co hanh
vu hoc » tu hoc, va hoc, vi hoc
du hoc » tu hoc, duoc hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( so hanh trinh nghiep vu hoc ) or ( duy khanh ((trinh nghe) or (trinh thi)) du hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so hanh trinh nghiep vu hoc ) OR ( duy khanh ((trinh nghe) OR (trinh thi)) du hoc )).
• Adding a wildcard symbol may retrieve word variants: (( so hanh trinh nghiep vu hoc ) or ( duy khanh ((trinh nghe) or (trinh thi)) du hoc ))*.