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 xa » trang xa, tang ma, lang xa
hieu ve » hieu va, hieu van
duc ban » duc tan, duc van, duc man
dua ban » dia ban, cua ban, qua ban
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
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 sac ky tang xa hoi. hieu ve cam ((duc ban) or (dua ban)) thanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky tang xa hoi. hieu ve cam ((duc ban) OR (dua ban)) thanh dai cua triet.
• Adding a wildcard symbol may retrieve word variants: su sac ky tang xa hoi. hieu ve cam ((duc ban) or (dua ban)) thanh dai cua triet*.