Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
nhanh cong » nhanh chong, thanh cong, nganh cong
hoc nhanh » hoc nganh, hoc phan
thu sach » thuat sach, thuoc sach, thu hoach
cong hoc » dong hoc, cong hoa, cong coc
ca doanh » cac doanh, cua doanh, cao doanh
tu sach » su sach, te sach, tu cach
ma hoi » mai hoi, xa hoi, ma hoa
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: ((tu sach) OR (thu sach)) hoc tap, nghien cua cong hoc nhanh cong hoc ma hoi ca doanh tai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) hoc tap, nghien cua cong hoc nhanh cong hoc ma hoi ca doanh tai".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) hoc tap, nghien cua cong hoc nhanh cong hoc ma hoi ca doanh tai*.