Perhaps you should try some spelling variations:
hanh than » hanh han, hanh nhan, hanh phan
cua triet » cua viet, su triet, va triet
than cua » nhan cua, thai cua, ban cua
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
xuc van » duc van, luc van, vuc van
ro hai » o hai, so hai, do hai
co hai » co dai, co hoi, o hai
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: vu sach ky nang ((ro hai) OR (co hai)). hieu ve cam ((xuc van) or (duc tan)) hanh than cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang ((ro hai) OR (co hai)). hieu ve cam ((xuc van) OR (duc tan)) hanh than cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky nang ((ro hai) OR (co hai)). hieu ve cam ((xuc van) or (duc tan)) hanh than cua triet".
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang ((ro hai) OR (co hai)). hieu ve cam ((xuc van) or (duc tan)) hanh than cua triet*.