Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
luc nganh » luc ngan, chuc nganh, luat nganh
sach doi » sach hoi, sach moi, sach dao
cuu nang » cam nang, cuu van, cao nang
khoa hoc » hoa hoc
hang tai » hang va, dung tai
so sach » so sanh, bo sach, co sach
doi tac » dong tac
va hang » van hang, va nang, va lang
hoc xa » hoc ma
chuc » thuc, chu, chua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach doi tac, nghien ((cuu nang) or (chuc nang)) luc nganh khoa hoc xa hoi va hang tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach doi tac, nghien ((cuu nang) OR (chuc nang)) luc nganh khoa hoc xa hoi va hang tai.
• Adding a wildcard symbol may retrieve word variants: so sach doi tac, nghien ((cuu nang) or (chuc nang)) luc nganh khoa hoc xa hoi va hang tai*.