Perhaps you should try some spelling variations:
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
van phan » van phong, van thanh, luan phan
phan van » pham van, thanh van, luan van
vu sach » vu bach, su sach, vu khach
hoi van » hoi va, hoi dan, hai van

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach hoc tap, nghien cuu dong luc nganh ((khoa hoc) OR (hoa hoc)) xa hoi van phan van~".
• Adding a wildcard symbol may retrieve word variants: vu sach hoc tap, nghien cuu dong luc nganh ((khoa hoc) OR (hoa hoc)) xa hoi van phan van*.