Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
va triet » va thiet, va trien, ve triet
thanh vi » hanh vi, thanh va, thanh ve
nhan luc » nang luc
su triet » su viet, su tien, ve triet
hieu va » lieu va, hieu qua
sach ky » sac ky, sach ty, sach kem
luc van » luoc van, luu van, duc van
va nhan » van nhan, ca nhan, va phan
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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

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