Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
cuu tre » cau tren, cau treo
xua ban » xuat ban, cua ban, qua ban
cua tre » cua te, cua triet, dua tren
ban anh » ban hanh, ban banh, ban danh
nam xua » nam cua, nam mua, nam qua
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
sac ky » cac ky, sai ky
anh vi » hanh vi, anh va, anh ve
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang xa hoi. ((hieu van) OR (hieu va)) nam xua ban anh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang xa hoi. ((hieu van) OR (hieu va)) nam xua ban anh vi ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang xa hoi. ((hieu van) OR (hieu va)) nam xua ban anh vi ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang xa hoi. ((hieu van) OR (hieu va)) nam xua ban anh vi ((cua tre) or (cuu tre))*.