Perhaps you should try some spelling variations:
ve triet » va trien, su triet
van hanh » van thanh, ban hanh, van anh
hieu va » lieu va, hieu qua
hanh vu » hanh vi, hanh va, hanh tu
luc van » luoc van, luu van, duc van
cam luc » cam xuc, cau luc
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu van
dong ha » dong hoa, dong va, dong hoc
ky dong » ly dong, ky dang, ky cong
ha hoi » hoa hoi, ha noi, xa hoi
vu ve » vu le, vu va, su ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky dong ha hoi. ((hieu ve) OR (hieu va)) cam luc van hanh vu ve triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky dong ha hoi. ((hieu ve) OR (hieu va)) cam luc van hanh vu ve triet".
• Adding a wildcard symbol may retrieve word variants: te sach ky dong ha hoi. ((hieu ve) OR (hieu va)) cam luc van hanh vu ve triet*.