Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
truc van » truc va, thuc van, truc ban
lang xa » lang ha, dang xay, lang van
hanh ve » hanh vi, hanh va, hanh kem
hanh de » hanh kem
ky lang » ky nang, ky dang, ky tang
te cac » tu cac, ve cac, te cao
ve cau » va cau, ve cac, le cau
ke cau » ket cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: te cac ky lang xa hoi. hieu ((ve cau) OR (ke cau)) truc van ((hanh de) or (hanh ve)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ky lang xa hoi. hieu ((ve cau) OR (ke cau)) truc van ((hanh de) OR (hanh ve)) va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cac ky lang xa hoi. hieu ((ve cau) OR (ke cau)) truc van ((hanh de) or (hanh ve)) va triet".
• Adding a wildcard symbol may retrieve word variants: te cac ky lang xa hoi. hieu ((ve cau) OR (ke cau)) truc van ((hanh de) or (hanh ve)) va triet*.