Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thu sach » tu sach, thuoc sach, thu hoach
hanh hai » thanh hai, nhanh hai, hang hai
va hanh » van hanh, va thanh, va danh
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
hai cua » thai cua, dai cua, hoi cua
va cao » va co, va dao, va bao
xuc va » duc va, tuc va, luc va

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) OR (thuat sach)) ty nang xa hoi. hieu ((va cac) or (va cao)) xuc va hanh hai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuat sach)) ty nang xa hoi. hieu ((va cac) OR (va cao)) xuc va hanh hai cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuat sach)) ty nang xa hoi. hieu ((va cac) or (va cao)) xuc va hanh hai cua vat".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (thuat sach)) ty nang xa hoi. hieu ((va cac) or (va cao)) xuc va hanh hai cua vat*.