Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
thong hoc » thuong hoc, tuong hoc, thong hoa
duong hoc » dong hoc, dung hoc, duong hoi
khong hoc » khung hoc, khong thuoc, khong chuc
sach hoi » sach doi, sach moi, cach thoi
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
hoc xa » hoc ma

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 hoi dap, nghien cuu ((thong hoc) OR (duong hoc)) nganh khong hoc xa hoi va thanh san~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hoi dap, nghien cuu ((thong hoc) OR (duong hoc)) nganh khong hoc xa hoi va thanh san".
• Adding a wildcard symbol may retrieve word variants: tu sach hoi dap, nghien cuu ((thong hoc) OR (duong hoc)) nganh khong hoc xa hoi va thanh san*.