Perhaps you should try some spelling variations:
hoc nhanh » hoc phan
danh nhan » doanh nhan, thanh nhan, benh nhan
sach hoc » cach hoc, sach hoi, mach hoc
hoa danh » hoa doanh, hoa dan, hop danh
nhan tai » hang tai, van tai, toan tai
tu sach » thu sach, su sach, te sach
cuu mot » cua mot, cuu mo, huu mot

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 mot ((hoc nganh) or (hoc nhanh)) hoa hoc ma hoa danh nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien cuu mot ((hoc nganh) OR (hoc nhanh)) hoa hoc ma hoa danh nhan tai.
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu mot ((hoc nganh) or (hoc nhanh)) hoa hoc ma hoa danh nhan tai*.