Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thien van » thi van
cua viet » ca viet, hoa viet, cua vat
thanh de » hanh de, thanh ve, thanh do
hieu van » hieu va, lieu va, hieu ve
thu sach » tu sach, thuat sach, thuoc sach
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
cam tuc » cam xuc, cam tu, nam thuc
tuc van » thuc van, truc van, tuc va
te sach » toc sach
ma hoi » mai hoi, xa hoi, ma hoa
de cua » le cua, te cua, dieu cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (thu sach)) ky sang ma hoi. ((hieu van) OR (thien van)) cam tuc van thanh de cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thu sach)) ky sang ma hoi. ((hieu van) OR (thien van)) cam tuc van thanh de cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thu sach)) ky sang ma hoi. ((hieu van) OR (thien van)) cam tuc van thanh de cua viet".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thu sach)) ky sang ma hoi. ((hieu van) OR (thien van)) cam tuc van thanh de cua viet*.