Perhaps you should try some spelling variations:
nghien chuc » nghien cuu, nghiem thuc, nghiep thuc
nganh khoa » nganh hoa, nganh khong, doanh khoa
luc nganh » luc ngan, chuc nganh, luat nganh
sach toi » sach doi, sach hoi, sach moi
khoa hoc » hoa hoc
nhan tai » hang tai, toan tai
su sach » so sach, vu sach
toi tap » toi gap, toan tap, tong tap
van tai » von tai, van tuan
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: su sach toi tap, nghien chuc nang luc nganh khoa hoc xa hoi va ((nhan tai) or (van tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach toi tap, nghien chuc nang luc nganh khoa hoc xa hoi va ((nhan tai) OR (van tai)).
• Adding a wildcard symbol may retrieve word variants: su sach toi tap, nghien chuc nang luc nganh khoa hoc xa hoi va ((nhan tai) or (van tai))*.