Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
khong thuoc » khang thuoc, hong phuoc, dong thuoc
cuu chong » cuu cong, cuu phong, cuu phuong
chong hoc » chung hoc, chong doc, thong hoc
hoc nganh » hoc nhanh
ban thanh » ban hanh, ban hang
thanh van » thanh san, thanh toan, thanh phan
thuoc xa » thuoc ma, thuoc va, thuoc la
tu sach » thu sach, su sach, te sach
doi dap » hoi dap, doi dau, doi dam
hoi ban » hoi dan, hoi bai, doi ban
do dap » do dai, do dac, do dan

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