Perhaps you should try some spelling variations:
thai nghien » thai nguyen, phap nghien, phan nghien
quach thai » quach thi, quang thai, quoc thai
thi nghiem » thuc nghiem
nghien cua » nghien cuu, nghiep cua, nghiep vua
nghiem du » nghiem dau, nghiem d, nghiem de
cua thuoc » nha thuoc, cay thuoc, cua nuoc
sach thi » sach thu, sach tai, sach thieu
vu quach » vu quang, vu bach, vu khach
su sach » so sach, vu sach
du hoc » tu hoc, duoc hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su sach thi nghiem du hoc ) or ( vu quach thai nghien cua thuoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach thi nghiem du hoc ) OR ( vu quach thai nghien cua thuoc ))*.