Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
xach tay » canh tay
van hanh » van thanh, ban hanh, van anh
hanh lai » hanh lam, hanh tai, thanh lap
cua viet » ca viet, hoa viet, cua vat
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
duc van » duc va, duc tan, duc manh
lai cua » dai cua, hai cua, lai chau
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 ((xach tay) or (sach y)) nang ((x hoi) OR (x ho)). hieu ve cham duc van hanh lai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((xach tay) OR (sach y)) nang ((x hoi) OR (x ho)). hieu ve cham duc van hanh lai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((xach tay) or (sach y)) nang ((x hoi) OR (x ho)). hieu ve cham duc van hanh lai cua viet".
• Adding a wildcard symbol may retrieve word variants: tu ((xach tay) or (sach y)) nang ((x hoi) OR (x ho)). hieu ve cham duc van hanh lai cua viet*.