Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
khong thuoc » khang thuoc, hong phuoc, dong thuoc
thieu trac » thi trac, thieu cac, thieu tai
hoc nganh » hoc nhanh
thuoc la » thuoc ma, thuoc va, thuoc tai
nhan dan » phan dau, nhan tai
gian dan » gian lang
tu sach » thu sach, su sach, te sach
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
la hoi » lai hoi, xa hoi, le hoi

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 thieu trac, nghien cuu mot hoc nganh khong thuoc la hoi va ((nhan dan) or (gian dan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thieu trac, nghien cuu mot hoc nganh khong thuoc la hoi va ((nhan dan) OR (gian dan)).
• Adding a wildcard symbol may retrieve word variants: tu sach thieu trac, nghien cuu mot hoc nganh khong thuoc la hoi va ((nhan dan) or (gian dan))*.