Perhaps you should try some spelling variations:
thanh nhan » thanh phan, thanh san, thanh toan
hoc thanh » hoc nhanh, hoan thanh, hoc phan
van thanh » ban thanh, van tuan
hoi thanh » hai thanh, hoa thanh, ho thanh
sach dao » lanh dao
nhan dan » phan dau, gian dan, nhan tai
vu sach » vu bach, su sach, vu khach
dao tai » dao thai, dao tao, cao tai
hoc mai » hoc ma, hoc dai, hoc bai
mai hoi » mai khoi, dai hoi, lai hoi

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 mai hoi thanh 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 mai hoi thanh nhan dan.
• Adding a wildcard symbol may retrieve word variants: vu sach dao tai, nghien cuu mo ((hoc thanh) or (van thanh)) hoa hoc mai hoi thanh nhan dan*.