Perhaps you should try some spelling variations:
van thanh » ban thanh
su triet » su viet, su tien, ve triet
tham xuc » tham nuoc, tham thuc, pham duc
van tuan » van quan, van ban, anh tuan
hieu va » lieu va
sach tu » sach thu, cach tu, sach ty
dang ma » dang mau, dang mam, dang mat
tu dang » thu dang, tu dong, su dang
tu sach » thu sach, su sach, te sach
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 tu dang ma hoi. ((hieu va) or (hieu qua)) tham xuc ((van thanh) OR (van tuan)) ki su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu dang ma hoi. ((hieu va) OR (hieu qua)) tham xuc ((van thanh) OR (van tuan)) ki su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu dang ma hoi. ((hieu va) or (hieu qua)) tham xuc ((van thanh) OR (van tuan)) ki su triet*".