Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
su triet » su viet, su tien, ve triet
van chat » cao chat
dua ban » dia ban, cua ban, qua ban
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
van ca » van cau, van cua, dan ca
ma hoi » mai hoi, xa hoi, me hoi
vai su » va su, van su, lai su

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang ((ma hoi) or (ma hoa)). hieu ((van chat) or (van ca)) dua ban thanh vai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang ((ma hoi) OR (ma hoa)). hieu ((van chat) OR (van ca)) dua ban thanh vai su triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang ((ma hoi) or (ma hoa)). hieu ((van chat) or (van ca)) dua ban thanh vai su triet*.