Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuoc sinh
thuat sach » thuat lanh, thuat san
hieu van » hieu va, thien van, lieu va
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, nam thuc
cuu tre » cua tre, cau tren, cau treo
hieu ve » hieu va
nang xa » nang x, lang xa, nang ma
tuc va » thuc va, truc va, tuc xa
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: ((thuoc sach) OR (thuat sach)) ky nang xa hoi. ((hieu ve) or (hieu van)) cam tuc va hanh va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (thuat sach)) ky nang xa hoi. ((hieu ve) OR (hieu van)) cam tuc va hanh va cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) OR (thuat sach)) ky nang xa hoi. ((hieu ve) or (hieu van)) cam tuc va hanh va cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) OR (thuat sach)) ky nang xa hoi. ((hieu ve) or (hieu van)) cam tuc va hanh va cuu tre*.