Perhaps you should try some spelling variations:
ve triet » va trien, su triet
cua duc » cua tuc, cua nuoc, cua quoc
va hanh » van hanh, va thanh, va danh
toc sac » toc sach, toc san, hoc sach
nang ma » tang ma, sang ma, nang cao
va cam » va cham, va cao, va cai
sac ky » cac ky, sai ky
xuc va » duc va, tuc va, luc va
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sac ky nang ma hoi. hieu ((va cam) OR (va cac)) xuc va hanh vi ((cua duc) or (ve triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky nang ma hoi. hieu ((va cam) OR (va cac)) xuc va hanh vi ((cua duc) OR (ve triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sac ky nang ma hoi. hieu ((va cam) OR (va cac)) xuc va hanh vi ((cua duc) or (ve triet))".
• Adding a wildcard symbol may retrieve word variants: toc sac ky nang ma hoi. hieu ((va cam) OR (va cac)) xuc va hanh vi ((cua duc) or (ve triet))*.