Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
nghien huu » nghien cuu, nguyen huu, nhiem huu
sach hoi » sach doi, sach moi, cach thoi
tung hoc » trung hoc, tuong hoc, dung hoc
toan tai » toan tap, toan ban, toan cao
hoi tai » hoc tai, hoi trac
hoc anh » hoc nganh, hoc nhanh, ngoc anh
anh hoa » anh khoa, danh hoa, hanh hoa
hoc xa » hoc ma
xa hop » xa hoi, va hop, xa hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach hoi tai, nghien huu tung hoc anh hoa hoc xa hop danh ((toan tai) OR (doanh tai))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach hoi tai, nghien huu tung hoc anh hoa hoc xa hop danh ((toan tai) OR (doanh tai))".
• Adding a wildcard symbol may retrieve word variants: thuat sach hoi tai, nghien huu tung hoc anh hoa hoc xa hop danh ((toan tai) OR (doanh tai))*.