Perhaps you should try some spelling variations:
sach duoc » sach nuoc, sach dao, sach dung
hoc nganh » hoc nhanh
nganh hoa » thanh hoa, khanh hoa, danh hoa
cach hoc » cach thuc, cach thoi, dich hoc
van nhan » van phan, van thanh, danh nhan
nhan tai » hang tai, van tai, toan tai
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoi van » hoi va, hoi dan, hai van
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 (cach hoc)) tap, nghien cuu mon hoc nganh hoa hoc xa hoi van nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach duoc) OR (cach hoc)) tap, nghien cuu mon hoc nganh hoa hoc xa hoi van nhan tai.
• Adding a wildcard symbol may retrieve word variants: tu ((sach duoc) or (cach hoc)) tap, nghien cuu mon hoc nganh hoa hoc xa hoi van nhan tai*.