Perhaps you should try some spelling variations:
giang lang » gian lang, giang van, gian lan
sach duoc » sach nuoc, sach dao, sach dung
nhan khoa » nha khoa, khuan khoa, toan khoa
cau giang » hau giang, ca giang, bai giang
sach hoi » sach doi, sach moi, cach thoi
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
hoc nhan » hoc nhanh, nhoc nhan, hoc phan
khoa hoc » hoa hoc
hoi cau » hoi chu, hoc cau, hoa cau
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: tu ((sach duoc) or (sach hoi)) tap, nghien cuu cong hoc nhan khoa hoc xa hoi cau giang lang~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach duoc) OR (sach hoi)) tap, nghien cuu cong hoc nhan khoa hoc xa hoi cau giang lang.
• Adding a wildcard symbol may retrieve word variants: tu ((sach duoc) or (sach hoi)) tap, nghien cuu cong hoc nhan khoa hoc xa hoi cau giang lang*.