Perhaps you should try some spelling variations:
nganh cong » nhanh chong, thanh cong
cong thuoc » cong thuc, dong thuoc, long thuoc
hoc sach » hoc sinh, hoc cac, hoc anh
sach hoi » sach doi, sach moi, cach thoi
dong hoc » dong luc
thuoc xa » thuoc ma, thuoc va, thuoc la
nhan tai » hang tai, van tai, toan tai
va nhan » van nhan, ca nhan, va phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach hoi dap, nghien cuu ((dong hoc) or (dong co)) nganh cong thuoc xa hoi va nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach hoi dap, nghien cuu ((dong hoc) OR (dong co)) nganh cong thuoc xa hoi va nhan tai.
• Adding a wildcard symbol may retrieve word variants: hoc sach hoi dap, nghien cuu ((dong hoc) or (dong co)) nganh cong thuoc xa hoi va nhan tai*.