Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
hieu ve » hieu va, hieu van
toan su » toan du, toan tu, toan cau
sac ky » sai ky
ve cam » ve cham, ve cac, va cam
cam tu » cam thu, nam tu, dam tu
tan su » dan su, van su, ban su
x hoi » xa hoi, o hoi, x ho

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