Perhaps you should try some spelling variations:
ve triet » va trien, su triet
va thanh » gia thanh, ban thanh, le thanh
toan ve » toan va, toan ke, toan von
va tinh » may tinh
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
san ky » sang ky, van ky, dan ky
ve cam » ve cham, ve cac, va cam
cam tu » cam thu, nam tu, dam tu
te san » te ban, ke san, tu san

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

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