Perhaps you should try some spelling variations:
tham luu » tam luu, thanh luu, cham cuu
ban hanh » ban hang
hanh van » thanh van, khanh van, hanh va
su triet » su tien, ve triet
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
luu ban » luu bang, luu van, luu dan
su viet » so viet
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: tu cac ky nang o hoi. hieu va tham luu ban hanh van ((su triet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang o hoi. hieu va tham luu ban hanh van ((su triet) OR (su viet)).
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang o hoi. hieu va tham luu ban hanh van ((su triet) or (su viet))*.