Perhaps you should try some spelling variations:
hoc doanh » hoa doanh, hoc danh, hoc nganh
sach hoc » cach hoc, sach hoi, mach hoc
khoa hoc » hoa hoc
nang dau » hang dau, xang dau, nang du
tu sach » thu sach, su sach, te sach
cuu mon » cuu mo, cuu mot, cuu cong
va nang » van nang, da nang, cam nang
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 hoc tap, nghien cuu mon ((hoc doanh) OR (hoc dan)) khoa hoc xa hoi va nang dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hoc tap, nghien cuu mon ((hoc doanh) OR (hoc dan)) khoa hoc xa hoi va nang dau".
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu mon ((hoc doanh) OR (hoc dan)) khoa hoc xa hoi va nang dau*.