Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
va danh » va dinh, va dan, dia danh
cua tre » cuu tre, cua triet, dua tren
va hanh » van hanh, va thanh, ban hanh
hieu va » lieu va, hieu qua
cau luc » cau truc, cau phuc
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
va cau » van cau, va cac, va dau
cua te » cua tu

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