Perhaps you should try some spelling variations:
ve triet » va trien, su triet
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
vu sang » vua sang, vu dang, vu san
sang ma » tang ma, nang ma, sang tao
hieu va » lieu va, hieu qua
tu sach » thu sach, su sach, tu cach
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cac, va cao
ki ve » ke ve, gi ve, vi ve

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 (te sach)) vu sang ma hoi. hieu va cam xuc ((van hanh) or (van minh)) ki ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) vu sang ma hoi. hieu va cam xuc ((van hanh) OR (van minh)) ki ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) vu sang ma hoi. hieu va cam xuc ((van hanh) or (van minh)) ki ve triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) vu sang ma hoi. hieu va cam xuc ((van hanh) or (van minh)) ki ve triet*.