Perhaps you should try some spelling variations:
khanh hoa » thanh hoa, hang hoa
nganh hoa » thanh hoa, danh hoa, ninh hoa
danh nhan » doanh nhan, thanh nhan, benh nhan
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
tu sach » thu sach, su sach, te sach
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 hoc tap, nghien cuu cong hoc ((khanh hoa) or (nganh hoa)) hoc xa hoi danh nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien cuu cong hoc ((khanh hoa) OR (nganh hoa)) hoc xa hoi danh nhan tai.
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu cong hoc ((khanh hoa) or (nganh hoa)) hoc xa hoi danh nhan tai*.