Perhaps you should try some spelling variations:
khanh phuong » khanh phong, thanh phuong, khanh phung
doanh thanh » danh thanh, doanh nhan, dinh thanh
phuong hoa » huong hoa, phuong hoang, hung hoa
khoa doanh » hoa doanh, cho doanh, khoa dang
hoc khanh » hoc nhanh, hoc thanh, hoc hanh
thanh dau » thanh dat, thanh dam, thanh mau
cach hoc » cach thuc, cach thoi, dich hoc
cuu toan » cua toan, huu toan, cuu thanh
cuu hoan » luu hoang, cuu van, cuu khoa
mai khoa » tai khoa, may khoa, dai khoa
tu cach » tu cac
hoa mai » hoa dai, hoa may, hoa moi

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) or (cuu hoan)) hoc khanh phuong hoa mai khoa doanh thanh dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach hoc tap, nghien ((cuu toan) OR (cuu hoan)) hoc khanh phuong hoa mai khoa doanh thanh dau.
• Adding a wildcard symbol may retrieve word variants: tu cach hoc tap, nghien ((cuu toan) or (cuu hoan)) hoc khanh phuong hoa mai khoa doanh thanh dau*.