Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
dieu cua » dieu tra
tu cach » tu cac
cach tu » cach thuc
tu nang » tru nang, tu nong, tu nano
hieu va » lieu va, hieu qua
va cham » va chat, va tham
duc gia » quoc gia
de cua » le cua, te 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 cach tu nang ((x hoi) OR (x ho)). hieu va cham duc gia thanh ((de cua) or (dieu cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach tu nang ((x hoi) OR (x ho)). hieu va cham duc gia thanh ((de cua) OR (dieu cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cach tu nang ((x hoi) OR (x ho)). hieu va cham duc gia thanh ((de cua) or (dieu cua)) triet".
• Adding a wildcard symbol may retrieve word variants: tu cach tu nang ((x hoi) OR (x ho)). hieu va cham duc gia thanh ((de cua) or (dieu cua)) triet*.