Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
cham luc » cham soc, nhan luc, cham cuu
hieu va » lieu va, hieu qua
hieu ve » hieu van
tu sach » thu sach, su sach, te sach
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
luc va » duc va, tuc va, loc va
va dan » ca dan, va dao, va dau
dan va » doan va, dan ca, ban va
va cau » van cau, va cac, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((ty nang) or (ty hang)) xa hoi. ((hieu ve) OR (hieu va)) cham luc va dan va cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty hang)) xa hoi. ((hieu ve) OR (hieu va)) cham luc va dan va cau treo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) or (ty hang)) xa hoi. ((hieu ve) OR (hieu va)) cham luc va dan va cau treo".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) or (ty hang)) xa hoi. ((hieu ve) OR (hieu va)) cham luc va dan va cau treo*.