Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
lang xa » lang ha, dang xay, lang van
hieu va » lieu va
va hanh » van hanh, va thanh, va danh
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
san ky » sang ky, dan ky, ban ky
cac co » cac cong
co va » co ma, do va, so 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) or (van ky)) lang xa hoi. ((hieu va) or (hieu qua)) cac co va hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((san ky) OR (van ky)) lang xa hoi. ((hieu va) OR (hieu qua)) cac co va hanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: thu ((san ky) or (van ky)) lang xa hoi. ((hieu va) or (hieu qua)) cac co va hanh hai cua tre*.