Perhaps you should try some spelling variations:
su triet » su viet, su tien
truc van » truc va, thuc van, truc ban
ve triet » va trien
van hanh » van thanh, ban hanh, van anh
cam truc » cau truc, nam truc, lam truoc
hieu va » lieu va, hieu qua
hieu ve » hieu van
hanh va » hang va, hanh vi
nang xa » nang x, lang xa, nang ma
vu sach » vu bach, su sach, vu khach
y nang » ky nang, ly nang, v nang

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 y nang xa hoi. ((hieu ve) or (hieu va)) cam truc van hanh va ((ve triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang xa hoi. ((hieu ve) OR (hieu va)) cam truc van hanh va ((ve triet) OR (su triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y nang xa hoi. ((hieu ve) or (hieu va)) cam truc van hanh va ((ve triet) OR (su triet))*".