Perhaps you should try some spelling variations:
nhanh khung » nhanh hung, nhanh chuong, nhanh chong
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
hoc nhanh » hoc nganh, hoc phan
khung hoc » chung hoc, nhung hoc, thuong hoc
cach hoc » cach thuc, cach thoi, dich hoc
cong hoc » dong hoc, cong hoa, cong coc
hoa phan » hoa dan, co phan
gian dan » gian lang
tu cach » tu cac
hoa van » hoa dan, hoang van, hoa lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cach hoc tap, nghien thu cong hoc nhanh khung hoc ma ((hoa van) OR (hoa phan)) gian dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cach hoc tap, nghien thu cong hoc nhanh khung hoc ma ((hoa van) OR (hoa phan)) gian dan".
• Adding a wildcard symbol may retrieve word variants: tu cach hoc tap, nghien thu cong hoc nhanh khung hoc ma ((hoa van) OR (hoa phan)) gian dan*.