Perhaps you should try some spelling variations:
va thanh » ban thanh, va tinh, le thanh
ve triet » va trien, su triet
nang xa » nang x, lang xa, nang ma
toan ve » toan va, toan ke, toan von
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao

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

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