Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
cong cuoc » song cuoc, trong cuoc, luong cuoc
manh tung » manh hung, thanh tung
sach hoc » cach hoc, sach hoi, mach hoc
cong hoa » dong hoa, dong hoc, hang hoa
tu sach » thu sach, su sach, te sach
tung ho » tuong ho, trung hoc, trung hoa
voi cac » loi cach
nha dan » nhan dan, nhac dan, nha van
ma voi » ba voi, da voi, ma moi
ho ma » hoc ma, co ma, ho ba

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach hoc tap, nghien thu ((cong hoa) or (cong cuoc)) manh tung ho ma voi cac nha dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien thu ((cong hoa) OR (cong cuoc)) manh tung ho ma voi cac nha dan.
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien thu ((cong hoa) or (cong cuoc)) manh tung ho ma voi cac nha dan*.