Perhaps you should try some spelling variations:
trinh nghien » trinh nghe, kinh nghiem, trinh thiet
thieu nghiep » trien nghiep, nghiep nghiep, thi nghiem
hanh trinh » canh tranh, hanh chinh
nghien du » nghiep du, nghien cuu, nghiem dau
thu sach » tu sach, thuat sach, thuoc sach
dau hoc » dai hoc, dan hoc, day 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: (( thuc hanh trinh nghien du hoc ) or ( thu sach ((thieu nghiep) or (thieu nhi)) dau hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thuc hanh trinh nghien du hoc ) OR ( thu sach ((thieu nghiep) OR (thieu nhi)) dau hoc )).
• Adding a wildcard symbol may retrieve word variants: (( thuc hanh trinh nghien du hoc ) or ( thu sach ((thieu nghiep) or (thieu nhi)) dau hoc ))*.