Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hoc nganh » hoc nhanh
nganh hoa » thanh hoa, khanh hoa, danh hoa
sach hoc » cach hoc, sach hoi, mach hoc
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
hoi danh » hop danh, hoi dan, hoc danh
nhan tai » hang tai, van tai
toan tai » toan tap, doanh tai, toan ban
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: thuat sach hoc tap, nghien cuu cong hoc nganh hoa hoc xa hoi danh ((nhan tai) or (toan tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach hoc tap, nghien cuu cong hoc nganh hoa hoc xa hoi danh ((nhan tai) OR (toan tai)).
• Adding a wildcard symbol may retrieve word variants: thuat sach hoc tap, nghien cuu cong hoc nganh hoa hoc xa hoi danh ((nhan tai) or (toan tai))*.