Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
nganh nang » nganh nong, ganh nang, ngan hang
luc nganh » luc ngan, chuc nganh, luat nganh
sach hoc » cach hoc, sach hoi, mach hoc
cuu dong » cuu cong, cuu tong, cuu long
dong luc » nang luc
nang hoc » nang doc, nang luc, dong hoc
hoa chat » hop chat, hoa phan
nhan dan » gian dan, nhan tai
phan dau » phan tu, hang dau
hoc tai » hoc dai, hoc tap, hoc bai

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach hoc tai, nghien cuu dong luc nganh nang hoc ma hoa chat ((nhan dan) OR (phan dau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach hoc tai, nghien cuu dong luc nganh nang hoc ma hoa chat ((nhan dan) OR (phan dau))".
• Adding a wildcard symbol may retrieve word variants: thuoc sach hoc tai, nghien cuu dong luc nganh nang hoc ma hoa chat ((nhan dan) OR (phan dau))*.