Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
tu cach » tu cac
nang xa » nang x, lang xa, nang ma
hieu va » lieu va
cao tuc » dao tuc, cao duc, cao suc
xa hanh » xa thanh, xa khanh, va hanh
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua

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

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