Perhaps you should try some spelling variations:
khong thuoc » khang thuoc, hong phuoc, dong thuoc
nganh khong » nganh cong, nhanh chong, nganh nong
hoc nganh » hoc nhanh
thuoc sai » thuoc tai, thuoc san, thuoc sach
tu sach » thu sach, su sach, te sach
hoi tap » hoc tap, hoi tai, hai tap
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
sai hoi » dai hoi, lai hoi, mai hoi
van tai » von tai, van tuan

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 tap) OR (hoi dap)), nghien cuu mot hoc nganh khong thuoc sai hoi va van tai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((hoi tap) OR (hoi dap)), nghien cuu mot hoc nganh khong thuoc sai hoi va van tai".
• Adding a wildcard symbol may retrieve word variants: tu sach ((hoi tap) OR (hoi dap)), nghien cuu mot hoc nganh khong thuoc sai hoi va van tai*.