Perhaps you should try some spelling variations:
trinh nghien » trinh nghe, trinh thiet, trinh dien
nghiem duoc » nghiem thuoc, nghe duoc
thuat lanh » thuat lap, thuat san
lanh trinh » hanh trinh, anh trinh, lanh tranh
nghien dan » nghiep dan, nghe dan, nghia dan
duoc hoc » quoc hoi
dan hoc » van hoc, dan toc, dai hoc
tu sach » thu sach, su sach, te sach
kinh » dinh, minh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thuat lanh trinh nghien dan hoc ) or ( tu sach kinh nghiem duoc hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thuat lanh trinh nghien dan hoc ) OR ( tu sach kinh nghiem duoc hoc )).
• Adding a wildcard symbol may retrieve word variants: (( thuat lanh trinh nghien dan hoc ) or ( tu sach kinh nghiem duoc hoc ))*.