Perhaps you should try some spelling variations:
hanh than » hanh nhan, hanh phan, nhanh thanh
hanh han » hanh nhan, hanh phan, hanh san
thu san » thuy san, thu ban, phu san
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va
nang xa » nang x, lang xa, nang ma
san ky » sang ky, van ky, dan ky
cac su » cach su, cac sau, cac du
su va » su van, tu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu san ky nang xa hoi. ((hieu va) or (hieu qua)) cac su va ((hanh than) OR (hanh han)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu san ky nang xa hoi. ((hieu va) OR (hieu qua)) cac su va ((hanh than) OR (hanh han)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu san ky nang xa hoi. ((hieu va) or (hieu qua)) cac su va ((hanh than) OR (hanh han)) cua tre".
• Adding a wildcard symbol may retrieve word variants: thu san ky nang xa hoi. ((hieu va) or (hieu qua)) cac su va ((hanh than) OR (hanh han)) cua tre*.