Perhaps you should try some spelling variations:
tham xuc » tham nuoc, tham thuc, pham duc
su triet » su tien, ve triet
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
tu sach » thu sach, su sach, te sach
sach vu » sach va, sach tu, sach uu
va tham » van tham, va cham, va thanh
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
vu nang » vuc nang, va nang, vu dang
su viet » so viet
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 vu nang ma hoi. hieu va tham xuc ((van hanh) or (ban hanh)) ki ((su triet) OR (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach vu nang ma hoi. hieu va tham xuc ((van hanh) OR (ban hanh)) ki ((su triet) OR (su viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach vu nang ma hoi. hieu va tham xuc ((van hanh) or (ban hanh)) ki ((su triet) OR (su viet))".
• Adding a wildcard symbol may retrieve word variants: tu sach vu nang ma hoi. hieu va tham xuc ((van hanh) or (ban hanh)) ki ((su triet) OR (su viet))*.