Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
hoa nganh » hoc nganh, khoi nganh, hoa thanh
hoa doanh » toan doanh, hoa dan
khong hoc » khung hoc, thong hoc, khong thuoc
cach tuc » cach thuc, cach tu, bach tuoc
van gian » van giang, dan gian, van giao
gian dan » gian lang
tu cach » tu cac
hoa van » hoa dan, hoang van, hoa phan

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 tuc tap, nghien thu cong ((hoa nganh) OR (hoa doanh)) khong hoc ma hoa van gian dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cach tuc tap, nghien thu cong ((hoa nganh) OR (hoa doanh)) khong hoc ma hoa van gian dan".
• Adding a wildcard symbol may retrieve word variants: tu cach tuc tap, nghien thu cong ((hoa nganh) OR (hoa doanh)) khong hoc ma hoa van gian dan*.