Perhaps you should try some spelling variations:
tham xuc » tham nuoc, tham thuc, pham duc
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
su triet » su viet, su tien, ve triet
tu sach » thu sach, su sach, te sach
sach vu » sach va, sach tu, sach uu
vu nang » vuc nang, va nang, vu dang
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
ma hoi » mai hoi, xa hoi, ma hoa
ki su » ky su

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~.
• 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".
• 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*.