Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu hien » bieu hien, dieu hien, chieu chien
danh hai » dang hai, lanh hai, manh hai
nang ma » tang ma, sang ma, nang cao
vu sach » vu bach, su sach, vu khach
cac ban » cac dan, can ban, cac bai
cac van » cac dan
va danh » va dinh, va dan, va hanh
hai cua » thai cua, dai cua, hoi cua
tu sach » thu sach, su sach, te sach
ma hoi » mai hoi, xa hoi, ma hoa

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) or (vu sach)) ky nang ma hoi. hieu hien ((cac ban) OR (cac van)) va danh hai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (vu sach)) ky nang ma hoi. hieu hien ((cac ban) OR (cac van)) va danh hai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (vu sach)) ky nang ma hoi. hieu hien ((cac ban) OR (cac van)) va danh hai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (vu sach)) ky nang ma hoi. hieu hien ((cac ban) OR (cac van)) va danh hai cua triet*.