Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
cau luoc » cau luc, muu luoc, hau loc
luoc van » luoc can, luoc va, luc van
ky lang » ky nang, ky dang, ky tang
hanh de » hanh ve, hanh kem
hieu ve » hieu va, hieu van
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ha hoi » hoa hoi, xa hoi, va hoi
ve cau » ke cau, va cau, ve cac

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 lang ((ha hoi) OR (ha noi)). hieu ve cau luoc van ((hanh de) or (hanh vi)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang ((ha hoi) OR (ha noi)). hieu ve cau luoc van ((hanh de) OR (hanh vi)) va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky lang ((ha hoi) OR (ha noi)). hieu ve cau luoc van ((hanh de) or (hanh vi)) va triet".
• Adding a wildcard symbol may retrieve word variants: te sac ky lang ((ha hoi) OR (ha noi)). hieu ve cau luoc van ((hanh de) or (hanh vi)) va triet*.