Perhaps you should try some spelling variations:
phan thong » phan thuong, phan hong, phan tong
thong hoc » thuong hoc, tuong hoc, thong hoa
nhan tai » hang tai, van tai, toan tai
van nhan » van phan, van thanh, danh nhan
hoc phan » hoc dan, hoc pho
dong hoc » dong co, dong luc
cuu dong » cuu cong, cuu tong, cuu long
hoc sach » hoc sinh, hoc cac, hoc anh
doi tap » doi tac, doi dap, doi tai
hoc mai » hoc ma, hoc dai, hoc may
mai hoi » mai khoi, dai hoi, lai hoi
hoi van » hoi va, hoi dan, hai van
so sanh » do sanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sanh) or (hoc sach)) doi tap, nghien cuu dong hoc phan thong hoc mai hoi van nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sanh) OR (hoc sach)) doi tap, nghien cuu dong hoc phan thong hoc mai hoi van nhan tai*.