Perhaps you should try some spelling variations:
nganh khung » nganh khong, nhanh hung
luc nganh » luc ngan, chuc nganh, luat nganh
khung hoc » chung hoc, nhung hoc, thuong hoc
cuu dong » cuu cong, cuu tong, cuu long
dong luc » nang luc
van nhan » van phan, van thanh, danh nhan
nhan tai » hang tai, van tai, toan tai
tu sach » thu sach, su sach, te sach
so sach » so sanh, bo sach, co sach
hoa van » hoa dan, hoang van, hoa phan

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) or (so sach)) hoi dap, nghien cuu dong luc nganh khung hoc ma hoa van nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (so sach)) hoi dap, nghien cuu dong luc nganh khung hoc ma hoa van nhan tai.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (so sach)) hoi dap, nghien cuu dong luc nganh khung hoc ma hoa van nhan tai*.