Perhaps you should try some spelling variations:
ve triet » va trien, su triet
hanh vu » hanh va, hanh tu, hanh ve
luc van » luoc van, luu van, duc van
cam luc » cam xuc, cau luc
sach ky » sach y, sach ty, sach kem
dong ha » dong hoa, dong va, dong hoc
hieu ve » hieu va, hieu van
ha hoi » hoa hoi, ha noi, xa hoi
ve cam » ve cham, ve cac, va cam
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ky) or (sac ky)) dong ha hoi. hieu ve cam luc van ((hanh vu) OR (hanh vi)) ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sac ky)) dong ha hoi. hieu ve cam luc van ((hanh vu) OR (hanh vi)) ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sac ky)) dong ha hoi. hieu ve cam luc van ((hanh vu) OR (hanh vi)) ve triet".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sac ky)) dong ha hoi. hieu ve cam luc van ((hanh vu) OR (hanh vi)) ve triet*.