Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
hieu va » lieu va, hieu qua
hanh va » hang va, hanh vi
xuc van » duc van, luc van, xuc ban
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
va cuu » va cau, va chu, va huu

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) or (thu sach)) ky nang xa hoi. ((hieu ve) OR (hieu va)) cam xuc van hanh va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thu sach)) ky nang xa hoi. ((hieu ve) OR (hieu va)) cam xuc van hanh va cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (thu sach)) ky nang xa hoi. ((hieu ve) OR (hieu va)) cam xuc van hanh va cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thu sach)) ky nang xa hoi. ((hieu ve) OR (hieu va)) cam xuc van hanh va cuu tre*.