Perhaps you should try some spelling variations:
kdieu cua » bieu cua, dien cua, hieu cua
cam luoc » cam xuc, tom luoc, cam lo
dieu cua » dieu tra
ban hanh » ban hang
luoc ban » luoc can, quoc ban, buoc ban
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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 ky nang ((x hoi) OR (o hoi)). hieu ve cam luoc ban hanh ((kdieu cua) or (dieu cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ((x hoi) OR (o hoi)). hieu ve cam luoc ban hanh ((kdieu cua) OR (dieu cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ((x hoi) OR (o hoi)). hieu ve cam luoc ban hanh ((kdieu cua) or (dieu cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ((x hoi) OR (o hoi)). hieu ve cam luoc ban hanh ((kdieu cua) or (dieu cua)) tre*.