Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
va triet » va thiet, va trien, ve triet
thanh vi » hanh vi, thanh va, thanh ve
van nhan » van phan, danh nhan, van khanh
nhan luu » nhan luc, nhan lupus, nhan luan
luu van » cuu van, luan van, luu hanh
sai ky » sac ky
tu sai » tu bai, tu san, tu cai
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky nang ((x hoi) OR (o hoi)). hieu van nhan luu van thanh vi ((va triet) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky nang ((x hoi) OR (o hoi)). hieu van nhan luu van thanh vi ((va triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky nang ((x hoi) OR (o hoi)). hieu van nhan luu van thanh vi ((va triet) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: tu sai ky nang ((x hoi) OR (o hoi)). hieu van nhan luu van thanh vi ((va triet) or (su triet))*.