Perhaps you should try some spelling variations:
van tham » van thanh, van tuan, van chat
su triet » su viet, su tien, ve triet
nang xa » nang x, lang xa, nang ma
va tham » va cham, va thanh, va thuat
cua tre » cua te, cuu tre, cua triet
tu van » tu va
luc va » duc va, tuc va, loc va
va dan » ca dan, va dao, va dau
dan vi » doan vi, don vi, dan va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu van ky nang xa hoi. hieu ((va tham) OR (van tham)) luc va dan vi ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu van ky nang xa hoi. hieu ((va tham) OR (van tham)) luc va dan vi ((cua tre) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu van ky nang xa hoi. hieu ((va tham) OR (van tham)) luc va dan vi ((cua tre) or (su triet))".
• Adding a wildcard symbol may retrieve word variants: tu van ky nang xa hoi. hieu ((va tham) OR (van tham)) luc va dan vi ((cua tre) or (su triet))*.