Perhaps you should try some spelling variations:
khong thuc » khong thuoc, phong thuc, thuong thuc
khong chuc » khong thuoc, cong chuc, hong phuc
nuoc sach » nguoi sach, hoc sach, cuoc cach
hoc nhanh » hoc nganh, hoc phan
sach hoi » sach doi, sach moi, cach thoi
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
dan nhan » danh nhan, dan chan, van nhan
nhan tai » hang tai, van tai, toan tai
hoi tap » hoi dap, hoc tap, hoi tai
hoa » khoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc sach hoi tap, nghien cuu cong hoc nhanh ((khong thuc) OR (khong chuc)) van hoa dan nhan tai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc sach hoi tap, nghien cuu cong hoc nhanh ((khong thuc) OR (khong chuc)) van hoa dan nhan tai".
• Adding a wildcard symbol may retrieve word variants: nuoc sach hoi tap, nghien cuu cong hoc nhanh ((khong thuc) OR (khong chuc)) van hoa dan nhan tai*.