Perhaps you should try some spelling variations:
long thuoc » luong thuoc, dong thuoc, khong thuoc
thuoc dang » thuoc dung, thuoc khang, thuc dan
dang khoa » dung khoa, hang khoa, dang khoi
van thanh » ban thanh, van tuan
tinh hoc » sinh hoc, tin hoc, hinh hoc
cuu long » cuu cong, cuu tong, cuu nang
khoa hoc » hoa hoc
va nhan » van nhan, ca nhan, va phan
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: ve tinh hoc tap, nghien cuu long thuoc dang khoa hoc xa hoi ((va nhan) or (van thanh)) va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ve tinh hoc tap, nghien cuu long thuoc dang khoa hoc xa hoi ((va nhan) OR (van thanh)) va.
• Adding a wildcard symbol may retrieve word variants: ve tinh hoc tap, nghien cuu long thuoc dang khoa hoc xa hoi ((va nhan) or (van thanh)) va*.