Perhaps you should try some spelling variations:
thuat sach » thuat san
thuat lanh » thuat lap, thuat san
chat luc » chat xuc, chat lua, nhan luc
va chat » van chat, va phat, cao chat
va hanh » van hanh, va thanh, va danh
cu tren » tu tren, dua tren
ma hoi » mai hoi, ma hoa, me hoi
luc va » duc va, tuc va, loc va
vi cu » vi su, vi xu, vi du

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuat sach) or (thuat lanh)) ky nang ((ma hoi) OR (xa hoi)). lieu va chat luc va hanh vi cu tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat sach) OR (thuat lanh)) ky nang ((ma hoi) OR (xa hoi)). lieu va chat luc va hanh vi cu tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat sach) or (thuat lanh)) ky nang ((ma hoi) OR (xa hoi)). lieu va chat luc va hanh vi cu tren".
• Adding a wildcard symbol may retrieve word variants: ((thuat sach) or (thuat lanh)) ky nang ((ma hoi) OR (xa hoi)). lieu va chat luc va hanh vi cu tren*.