Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
lanh hai » manh hai, thanh hai, lang chai
duc ban » duc tan, dua ban, duc man
hai cua » thai cua, dai cua, hoi cua
duc van » duc va, duc tan, duc manh
vu sach » vu bach, su sach, vu khach
hieu ve » hieu va, hieu van
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky danh
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ((ky dang) or (ky nang)) xay hoi. hieu ve cac ((duc ban) or (duc van)) lanh hai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ky dang) OR (ky nang)) xay hoi. hieu ve cac ((duc ban) OR (duc van)) lanh hai cua triet.
• Adding a wildcard symbol may retrieve word variants: vu sach ((ky dang) or (ky nang)) xay hoi. hieu ve cac ((duc ban) or (duc van)) lanh hai cua triet*.