Perhaps you should try some spelling variations:
dan hanh » dang hanh, dan khanh, dan thanh
te sach » toc sach
nang xa » nang x, lang xa, nang ma
cac cac » cac cach, cac bac, cac cam
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
y nang » ky nang, ly nang, v nang
ca cac » cua cac, va cac

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

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