Perhaps you should try some spelling variations:
hoc nganh » hoc nhanh
nganh hoa » thanh hoa, khanh hoa, danh hoa
sach hoi » sach doi, sach moi, cach thoi
sach bai » sach dao, cac bai, sach xa
lang dau » hang dau, xang dau, nang dau
va lang » va nang, hoa lang
mo hoc » mon hoc, co hoc
hoc xa » hoc ma

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) or (sach bai)) tap, nghien cuu mo hoc nganh hoa hoc xa hoi va lang dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach hoi) OR (sach bai)) tap, nghien cuu mo hoc nganh hoa hoc xa hoi va lang dau.
• Adding a wildcard symbol may retrieve word variants: tu ((sach hoi) or (sach bai)) tap, nghien cuu mo hoc nganh hoa hoc xa hoi va lang dau*.