Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » hieu qua
va danh » va dinh, va dan, va hanh
xuc va » duc va, tuc va, luc va
vi cua » vai cua
di cua » dai cua, doi cua, de cua

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

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