Perhaps you should try some spelling variations:
trinh nghien » trinh nghe, trinh thiet, trinh dien
nghiem duoc » nghiem thuoc, nghe duoc
canh trinh » canh tranh, hanh trinh, canh tinh
thuoc sach » hoc sach, thuat sach, thuoc sinh
nghien du » nghiep du, nghien cuu, nghiem dau
nuoc sach » nguoi sach, hoc sach, cuoc cach
thu canh » thuc hanh, thu cong, thu ban
duoc hoc » quoc hoi
du hoc » tu hoc
kinh » dinh, minh

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu canh trinh nghien du hoc ) OR ( ((thuoc sach) OR (nuoc sach)) kinh nghiem duoc hoc ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( thu canh trinh nghien du hoc ) or ( ((thuoc sach) OR (nuoc sach)) kinh nghiem duoc hoc ))~".
• Adding a wildcard symbol may retrieve word variants: (( thu canh trinh nghien du hoc ) or ( ((thuoc sach) OR (nuoc sach)) kinh nghiem duoc hoc ))*.