Perhaps you should try some spelling variations:
trinh nghien » trinh nghe, kinh nghiem, trinh dien
trinh thiet » trinh viet, trinh thi
sach trinh » sach tranh, sach kinh, sach tren
hanh trinh » canh tranh, hanh chinh
nghien tu » nghiep tu, nghien cuu, nghiep vu
thiet yeu » thiet ke, theo yeu
te sach » toc sach
yeu hoc » yeu hoi, lieu hoc, yeu nuoc
tu hoc » te hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( te sach trinh nghien tu hoc ) or ( thuc hanh trinh thiet yeu hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach trinh nghien tu hoc ) OR ( thuc hanh trinh thiet yeu hoc )).
• Adding a wildcard symbol may retrieve word variants: (( te sach trinh nghien tu hoc ) or ( thuc hanh trinh thiet yeu hoc ))*.