Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
van hanh » van thanh, ban hanh, van anh
tuc van » thuc van, truc van, tuc va
va cham » va chat, va tham
su sach » so sach, vu sach
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
ve cam » ve cham, ve cac, va cam
vi va » vi van, vai va, vu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ty nang) OR (ty hang)) xa hoi. hieu ((ve cam) or (va cham)) tuc van hanh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ty hang)) xa hoi. hieu ((ve cam) OR (va cham)) tuc van hanh vi va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty nang) OR (ty hang)) xa hoi. hieu ((ve cam) or (va cham)) tuc van hanh vi va triet*".