Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
van hanh » van thanh, ban hanh, van anh
truc van » truc va, thuc van, truc ban
ve cham » va cham, ve chat, vu cham
ky dang » ky danh
hanh vu » hanh vi, hanh va, hanh tu
xay hoi » xa hoi, tay hoi, cay phoi
te sac » te sach, te cac, te san
ve cam » ve cac, va cam, ve cai
vu va » vu van, tu va, su 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) OR (ky nang)) xay hoi. hieu ((ve cam) or (ve cham)) truc van hanh vu va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ((ky dang) OR (ky nang)) xay hoi. hieu ((ve cam) OR (ve cham)) truc van hanh vu va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ((ky dang) OR (ky nang)) xay hoi. hieu ((ve cam) or (ve cham)) truc van hanh vu va triet".
• Adding a wildcard symbol may retrieve word variants: te sac ((ky dang) OR (ky nang)) xay hoi. hieu ((ve cam) or (ve cham)) truc van hanh vu va triet*.