Perhaps you should try some spelling variations:
khoa nganh » khoi nganh, hoc nganh
nganh cong » nhanh chong, thanh cong
cong thon » cong thong, nong thon, cong hon
sach hoc » cach hoc, sach hoi, mach hoc
van khoa » van hoa, von khoa, san khoa
vu sach » vu bach, su sach, vu khach
thon xa » thong xa, thoi xa, thong xay
nhan va » nhan tai, nhan dan, nhan tao

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach hoc tap, nghien cuu van khoa nganh cong thon xa hoi va ((nhan va) or (hang va))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach hoc tap, nghien cuu van khoa nganh cong thon xa hoi va ((nhan va) OR (hang va)).
• Adding a wildcard symbol may retrieve word variants: vu sach hoc tap, nghien cuu van khoa nganh cong thon xa hoi va ((nhan va) or (hang va))*.