Perhaps you should try some spelling variations:
hoc nganh » hoc nhanh
nganh hoa » thanh hoa, khanh hoa, danh hoa
toc sach » hoc sach, doc sach, thuoc sach
van nhan » van phan, van thanh, danh nhan
nhan dan » phan dau, gian dan, nhan tai
doi tap » doi tac, doi dap, doi tai
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
hoi van » hoi va, hoi dan, hai van
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (dac sac)) doi tap, nghien cuu mot hoc nganh hoa hoc ma hoi van nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (dac sac)) doi tap, nghien cuu mot hoc nganh hoa hoc ma hoi van nhan dan.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (dac sac)) doi tap, nghien cuu mot hoc nganh hoa hoc ma hoi van nhan dan*.