Perhaps you should try some spelling variations:
hanh than » hanh han, hanh nhan, hanh phan
than cua » nhan cua, thai cua, ban cua
thu sac » thu sach, thu san, thu xac
hieu va » lieu va
cac lao » ca lao, cac loai, cac giao
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
lao va » tao va, cao va, bao va
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sac ky nang x hoi. ((hieu va) or (hieu qua)) cac lao va hanh than cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky nang x hoi. ((hieu va) OR (hieu qua)) cac lao va hanh than cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sac ky nang x hoi. ((hieu va) or (hieu qua)) cac lao va hanh than cua tre*.