Perhaps you should try some spelling variations:
luc nganh » luc ngan, chuc nganh, luat nganh
nganh hoa » thanh hoa, khanh hoa, danh hoa
sach hoi » sach doi, sach moi, cach thoi
cuu nang » cam nang, cuu van, cao nang
nhan tai » hang tai, van tai, toan tai
so sach » so sanh, bo sach, co sach
hoi tap » hoi dap, hoc tap, hoi tai
va nhan » van nhan, ca nhan, va phan
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 hoi tap, nghien ((cuu nang) or (chuc nang)) luc nganh hoa hoc xa hoi va nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach hoi tap, nghien ((cuu nang) OR (chuc nang)) luc nganh hoa hoc xa hoi va nhan tai.
• Adding a wildcard symbol may retrieve word variants: so sach hoi tap, nghien ((cuu nang) or (chuc nang)) luc nganh hoa hoc xa hoi va nhan tai*.