Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
nghien cac » nghiep cach, nghien cuu, nghiep cay
dong thuoc » dung thuoc, dang thuoc, don thuoc
cac nganh » hoc nganh
coc nganh » hoc nganh, chuc nganh, hoc nhanh
van nhan » van phan, van thanh, danh nhan
thuoc va » thuc va, thuoc ma, thuong va
nhan tai » hang tai, van tai, toan tai
sach hoi » sach doi, sach moi, cach thoi
cac cong » cua cong
hoi van » hoi va, hoi dan, hai van
hoi tap » hoi dap, hoc tap, hoi tai
va hoi » xa hoi, va hoc, va hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach hoi tap, nghien cac cong ((coc nganh) or (cac nganh)) dong thuoc va hoi van nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach hoi tap, nghien cac cong ((coc nganh) OR (cac nganh)) dong thuoc va hoi van nhan tai*.