Perhaps you should try some spelling variations:
hoc khanh » hoc nhanh, hoc hanh, hoa khanh
hoc thanh » hoc nhanh, hoan thanh, hoc phan
phong hoc » phong ho, thong hoc, phuong hoa
hoi doanh » hoa doanh, voi doanh, doi doanh
cach hoc » cach thuc, cach thoi, dich hoc
cuu toan » cuu hoan, cua toan, huu toan
nhan dan » phan dau, gian dan, nhan tai
tu cach » tu cac
hoc mai » hoc ma, hoc dai, hoc bai
mai hoi » mai khoi, dai hoi, lai hoi

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 cuu toan ((hoc khanh) OR (hoc thanh)) phong hoc mai hoi doanh nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cach hoc tap, nghien cuu toan ((hoc khanh) OR (hoc thanh)) phong hoc mai hoi doanh nhan dan".
• Adding a wildcard symbol may retrieve word variants: tu cach hoc tap, nghien cuu toan ((hoc khanh) OR (hoc thanh)) phong hoc mai hoi doanh nhan dan*.