Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
so sanh » do sanh
ty hang » ly hang, ty xang, thi hang
hang ma » hang va, hang ca, tang ma
qua cau » quan cau, qua cac, qua ca
cau luc » cau truc, cau phuc
va hanh » van hanh, va thanh, va danh
ma hoi » mai hoi, xa hoi, ma hoa
luc va » duc va, tuc va, loc va
tai va » thai va, mai va, tri 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) or (so sanh)) ty hang ma hoi. hieu qua cau luc va hanh tai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sanh)) ty hang ma hoi. hieu qua cau luc va hanh tai va triet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) ty hang ma hoi. hieu qua cau luc va hanh tai va triet*.