Perhaps you should try some spelling variations:
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » lieu va
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
te cac » tu cac, ve cac, te cao
den va » dien va, den vai, den vay

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

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