Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
sach ky » sac ky, sach y, sach ty
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
su sach » so sach, vu sach
ve cai » va cai, ve cac, ve tai
va cam » va cham, va cac, va cao
x hoi » o hoi, x ho, 5 hoi
va va » va van, va vua, va vai

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 ky nang ((x hoi) or (xa hoi)). hieu ((ve cai) or (va cam)) truc va hanh va va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang ((x hoi) OR (xa hoi)). hieu ((ve cai) OR (va cam)) truc va hanh va va triet.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang ((x hoi) or (xa hoi)). hieu ((ve cai) or (va cam)) truc va hanh va va triet*.