Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
thu sac » thu sach, thu san, thu xac
nang xa » nang x, lang xa, nang ma
hieu va » lieu va
hai cuu » hai cua, hai chu, hai cuc
cuu tre » cua tre, cau tren, cau treo
sac ky » cac ky, sai ky
lao va » tao va, cao va, bao va
lo va » lo van, ly va, le 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 sac ky nang xa hoi. ((hieu va) or (hieu qua)) cac ((lo va) OR (lao va)) hanh hai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sac ky nang xa hoi. ((hieu va) OR (hieu qua)) cac ((lo va) OR (lao va)) hanh hai cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sac ky nang xa hoi. ((hieu va) or (hieu qua)) cac ((lo va) OR (lao va)) hanh hai cuu tre*".