Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cham loc » cham soc, chon loc, cham o
va thanh » gia thanh, va tinh, le thanh
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
cua tre » cua te, cuu tre, cua triet
va cua » va chua, via cua, ca cua
x hoi » xa hoi, o hoi, 5 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 ((x hoi) or (x ho)). hieu ve cham loc ((va thanh) OR (ban thanh)) va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang ((x hoi) OR (x ho)). hieu ve cham loc ((va thanh) OR (ban thanh)) va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky nang ((x hoi) or (x ho)). hieu ve cham loc ((va thanh) OR (ban thanh)) va cua tre".
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang ((x hoi) or (x ho)). hieu ve cham loc ((va thanh) OR (ban thanh)) va cua tre*.