Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
nang xa » nang x, lang xa, nang ma
hanh di » hanh vi, hanh de, hang di
san ky » sang ky, van ky, dan ky
dao va » dao van, tao va, cao va
ve ca » ve cac, ve cai, ve cau
do va » do van, so va
di va » dai va, di vao, doi va

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

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