Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
hoc thanh » hoc nhanh, hoan thanh, hoc phan
sach moi » sach doi, sach hoi, sach bai
cong hoc » dong hoc, cong hoa, cong coc
nhan dan » phan dau, gian dan, nhan tai
pho hoc » phoi hoc, cho hoc, pho ho
hoc mai » hoc ma, hoc dai, hoc bai
mai hoi » mai khoi, dai hoi, lai hoi
hoi ca » hoi cua, hoi cac, hoi cau

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 moi) or (bach mai)) thoi, nghien thu cong hoc thanh pho hoc mai hoi ca nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach moi) OR (bach mai)) thoi, nghien thu cong hoc thanh pho hoc mai hoi ca nhan dan.
• Adding a wildcard symbol may retrieve word variants: tu ((sach moi) or (bach mai)) thoi, nghien thu cong hoc thanh pho hoc mai hoi ca nhan dan*.