Perhaps you should try some spelling variations:
nhanh cong » nhanh chong, thanh cong, nganh cong
hoc nhanh » hoc nganh, hoc phan
cong thuc » cong tac
thu sach » tu sach, thuat sach, thuoc sach
sach hoc » cach hoc, sach hoi, mach hoc
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
thuc ma » thuoc ma, thuc va, thuc ha
van tai » van tuan
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach hoc tap, nghien cuu mot hoc nhanh cong thuc ma hoi va ((van tai) OR (von tai))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach hoc tap, nghien cuu mot hoc nhanh cong thuc ma hoi va ((van tai) OR (von tai))".
• Adding a wildcard symbol may retrieve word variants: thu sach hoc tap, nghien cuu mot hoc nhanh cong thuc ma hoi va ((van tai) OR (von tai))*.