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