Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hang di » hang doi, hang vi, hang dien
hanh di » hanh vi, hanh de, danh di
toc sac » toc sach, toc san, hoc sach
nang xa » nang x, lang xa, nang ma
ve caic » ve cac
sac ky » cac ky, sai ky
do van » dao van, vo van, so van
ve cai » va cai, ve cac, ve tai

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 xa hoi. hieu ((ve cai) or (ve caic)) do van ((hanh di) OR (hang di)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky nang xa hoi. hieu ((ve cai) OR (ve caic)) do van ((hanh di) OR (hang di)) va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sac ky nang xa hoi. hieu ((ve cai) or (ve caic)) do van ((hanh di) OR (hang di)) va triet".
• Adding a wildcard symbol may retrieve word variants: toc sac ky nang xa hoi. hieu ((ve cai) or (ve caic)) do van ((hanh di) OR (hang di)) va triet*.