Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
cham loc » cham soc, chon loc, cham o
thanh vi » hanh vi, thanh va, thanh ve
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cua tre » cuu tre, cua triet, dua tren
loc va » hoc va, luc va
cua te » cua tu
5 hoi » o hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky nang ((5 hoi) or (x ho)). hieu ve cham loc va thanh vi ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang ((5 hoi) OR (x ho)). hieu ve cham loc va thanh vi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky nang ((5 hoi) or (x ho)). hieu ve cham loc va thanh vi ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang ((5 hoi) or (x ho)). hieu ve cham loc va thanh vi ((cua tre) OR (cua te))*.