Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
khong thuoc » khang thuoc, hong phuoc, dong thuoc
hoc nganh » hoc nhanh
sach thu » sach thue, sach thieu, sach tham
thu trac » thi trac, tu trac, thu trang
thuoc xa » thuoc ma, thuoc va, thuoc la
nhan dan » phan dau, nhan tai
gian dan » gian lang
tu sach » thu sach, su sach, te sach
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach thu trac, nghien cuu mot hoc nganh khong thuoc xa hoi va ((nhan dan) OR (gian dan))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thu trac, nghien cuu mot hoc nganh khong thuoc xa hoi va ((nhan dan) OR (gian dan))".
• Adding a wildcard symbol may retrieve word variants: tu sach thu trac, nghien cuu mot hoc nganh khong thuoc xa hoi va ((nhan dan) OR (gian dan))*.