Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren
va hanh » van hanh, va thanh, va danh
cau luc » cau truc, cau phuc
sach ly » sach y, sach lo, sach ty
tu sach » thu sach, su sach, te sach
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
luc va » duc va, tuc va, loc va

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 ly nang xa hoi. ((hieu ve) or (hieu va)) cau luc va hanh vi ((cuu tre) OR (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly nang xa hoi. ((hieu ve) OR (hieu va)) cau luc va hanh vi ((cuu tre) OR (cau treo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ly nang xa hoi. ((hieu ve) or (hieu va)) cau luc va hanh vi ((cuu tre) OR (cau treo))".
• Adding a wildcard symbol may retrieve word variants: tu sach ly nang xa hoi. ((hieu ve) or (hieu va)) cau luc va hanh vi ((cuu tre) OR (cau treo))*.