Perhaps you should try some spelling variations:
dang xay » dang van, van xay
cham loc » chon loc, cham o, hau loc
va hanh » van hanh, va thanh, va danh
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
hieu ve » hieu va, hieu van
ve van » le van
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ke va » te va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky dang xay hoi. hieu ve ((cham loc) or (cham soc)) va hanh ((ve van) or (ke va)) trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky dang xay hoi. hieu ve ((cham loc) OR (cham soc)) va hanh ((ve van) OR (ke va)) trien.
• Adding a wildcard symbol may retrieve word variants: te sac ky dang xay hoi. hieu ve ((cham loc) or (cham soc)) va hanh ((ve van) or (ke va)) trien*.