Perhaps you should try some spelling variations:
chieu thien » chieu chien, hieu hien
thien hach » thien thanh, hien hanh
hach duc » thach duc, hanh duoc, sach duoc
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
va cau » van cau, va dau, va cao

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 ((y nang) OR (v nang)) xa hoi. chieu thien hach duc va hanh ((va cau) or (va cac)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (v nang)) xa hoi. chieu thien hach duc va hanh ((va cau) OR (va cac)) tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) OR (v nang)) xa hoi. chieu thien hach duc va hanh ((va cau) or (va cac)) tren".
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) OR (v nang)) xa hoi. chieu thien hach duc va hanh ((va cau) or (va cac)) tren*.