Perhaps you should try some spelling variations:
thuat cach » thuat sach, thuat canh, thuat mach
nghien huy » nghien cuu, nguyen huy, nghiep quy
nhanh cong » nhanh chong, thanh cong, nganh cong
goc nhanh » hoc nhanh, doc nhanh, goc nhan
cong thuc » cong tac
cach hoc » cach thuc, cach thoi, dich hoc
phan van » pham van, thanh van, luan van
huy mot » huu mot, chua mot, huoc mot
thuc ma » thuoc ma, thuc va, thuc ha
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: thuat cach hoc tap, nghien huy mot goc nhanh cong thuc ma hoa van ((phan van) or (thanh san))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat cach hoc tap, nghien huy mot goc nhanh cong thuc ma hoa van ((phan van) OR (thanh san)).
• Adding a wildcard symbol may retrieve word variants: thuat cach hoc tap, nghien huy mot goc nhanh cong thuc ma hoa van ((phan van) or (thanh san))*.