Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
sang tao » hang tai
hieu van » hieu va, thien van, lieu va
te sach » toc sach
chu duc » thu duc, chua duoc, cuu duoc
tai cua » thai cua, tri cua, dai cua
cau duc » cao duc, cau luc, cau truc
sach ky » sac ky, sach y, sach ty
tao hoi » tao khoi, tao boi, tay hoi
ky sang » ky nang, ky dang, ky tang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky sang tao hoi. hieu van ((cau duc) OR (chu duc)) ban thanh ((tai cua) OR (tai cuc)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky sang tao hoi. hieu van ((cau duc) OR (chu duc)) ban thanh ((tai cua) or (tai cuc)) tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ky sang tao hoi. hieu van ((cau duc) OR (chu duc)) ban thanh ((tai cua) or (tai cuc)) tre*.