Perhaps you should try some spelling variations:
thien van » thi van
thu sach » tu sach, thuat sach, thuoc sach
luat tuc » luat thue
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y nang xa hoi. ((hieu va) or (thien van)) luat tuc ((va hanh) OR (va danh)) vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang xa hoi. ((hieu va) OR (thien van)) luat tuc ((va hanh) OR (va danh)) vi cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang xa hoi. ((hieu va) or (thien van)) luat tuc ((va hanh) OR (va danh)) vi cua tu".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang xa hoi. ((hieu va) or (thien van)) luat tuc ((va hanh) OR (va danh)) vi cua tu*.