Perhaps you should try some spelling variations:
nganh hoa » thanh hoa, khanh hoa, danh hoa
sach hoi » sach doi, sach moi, cach thoi
nhan dan » phan dau, gian dan, nhan tai
te sach » toc sach
hoi tai » hoc tai, hoi trac
mot hoc » mon hoc, mo hoc, bot hoc
hoc xa » hoc ma
hoi ca » hoi cua, hoi cac, hoi cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach hoi tai, nghien cuu ((mot hoc) OR (mot goc)) nganh hoa hoc xa hoi ca nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach hoi tai, nghien cuu ((mot hoc) OR (mot goc)) nganh hoa hoc xa hoi ca nhan dan".
• Adding a wildcard symbol may retrieve word variants: te sach hoi tai, nghien cuu ((mot hoc) OR (mot goc)) nganh hoa hoc xa hoi ca nhan dan*.