Perhaps you should try some spelling variations:
hang thai » hoang thai, hang tai, hong thai
hang hai » hoang hai, hang tai, thanh hai
cua tre » cua te, cuu tre, cua triet
dao xuc » dao duc, dao tuc, dao xu
hieu va » lieu va
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
xuc va » duc va, tuc va, luc va
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 lang xa hoi. ((hieu va) OR (hieu qua)) dao xuc va ((hang thai) or (hang hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky lang xa hoi. ((hieu va) OR (hieu qua)) dao xuc va ((hang thai) OR (hang hai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky lang xa hoi. ((hieu va) OR (hieu qua)) dao xuc va ((hang thai) or (hang hai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky lang xa hoi. ((hieu va) OR (hieu qua)) dao xuc va ((hang thai) or (hang hai)) cua tre*.