Perhaps you should try some spelling variations:
doanh chong » doanh chung, doanh thuong, nhanh chong
long luat » cong suat, long cua, cong luan
tong luan » tang luan, dung luan, hang luan
mach hoc » cach hoc, dich hoc, anh hoc
chong do » chong doc, cuong do, chong co
phan van » pham van, thanh van, luan van
te mach » ke mach, te sach, tim mach
va phan » van phan, va phat, va phap
do xa » doi xa, do va, o xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: te mach hoc tap, nghien cuu ((long luat) or (tong luan)) doanh chong do xa hoi va phan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te mach hoc tap, nghien cuu ((long luat) OR (tong luan)) doanh chong do xa hoi va phan van.
• Adding a wildcard symbol may retrieve word variants: te mach hoc tap, nghien cuu ((long luat) or (tong luan)) doanh chong do xa hoi va phan van*.