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
thu sach » tu sach, thuat sach, thuoc sach
cuu tong » cuu cong, cuu tinh, huu tung
tong luc » dong luc, tong cuc, truong luc
so sach » so sanh, bo sach, co sach
hoi tai » hoc tai, hoi trac
va phan » van phan, va phat, va phap
phan va » phan van, nhan va, han va
hoa va » hoa van, hoa xa, hoa vo

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (so sach)) hoi tai, nghien cuu tong luc nganh khung hoc ma hoa va phan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (so sach)) hoi tai, nghien cuu tong luc nganh khung hoc ma hoa va phan va.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (so sach)) hoi tai, nghien cuu tong luc nganh khung hoc ma hoa va phan va*.