Perhaps you should try some spelling variations:
hoc thanh » hoc nhanh, hoan thanh, hoc phan
van thanh » ban thanh, van tuan
danh nhan » doanh nhan, thanh nhan, benh nhan
sach dao » lanh dao
hoi danh » hop danh, hoi dan, hoc danh
nhan dan » phan dau, gian dan, nhan tai
vu sach » vu bach, su sach, vu khach
dao tai » dao thai, dao tao, cao tai
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: vu sach dao tai, nghien cuu mo ((hoc thanh) or (van thanh)) hoa hoc ma hoi danh nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach dao tai, nghien cuu mo ((hoc thanh) OR (van thanh)) hoa hoc ma hoi danh nhan dan.
• Adding a wildcard symbol may retrieve word variants: vu sach dao tai, nghien cuu mo ((hoc thanh) or (van thanh)) hoa hoc ma hoi danh nhan dan*.