Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
cua triet » cua viet, su triet, va triet
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
hieu ve » hieu va, hieu van
duc ban » duc tan, dua ban, duc man
duc van » duc va, duc tan, duc manh
su cac » tu cac, su cao, su can
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: su cac ky tang ma hoi. hieu ve cam ((duc ban) OR (duc van)) thanh dai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su cac ky tang ma hoi. hieu ve cam ((duc ban) OR (duc van)) thanh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: su cac ky tang ma hoi. hieu ve cam ((duc ban) OR (duc van)) thanh dai cua triet*.