Perhaps you should try some spelling variations:
khong thuoc » khang thuoc, hong phuoc, dong thuoc
nhanh khong » nhanh chong, nganh khong, nhan khong
nuoc sach » nguoi sach, hoc sach, cuoc cach
hoc nhanh » hoc nganh, hoc phan
thuoc van » thuoc va, thuc van, thuoc ban
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 » hoc tap, hoi tai, hai tap
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) OR (hoi dap)), nghien cuu cong hoc nhanh khong thuoc van hoa dan nhan tai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc sach ((hoi tap) OR (hoi dap)), nghien cuu cong hoc nhanh khong thuoc van hoa dan nhan tai".
• Adding a wildcard symbol may retrieve word variants: nuoc sach ((hoi tap) OR (hoi dap)), nghien cuu cong hoc nhanh khong thuoc van hoa dan nhan tai*.