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