Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » thien van, lieu va, hieu ve
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
cau luc » cau truc, cau phuc
va hanh » van hanh, va thanh, va danh
luc va » duc va, tuc va, loc va
x hoi » xa hoi, o hoi, x ho
vi ve » va ve, ve ve, vi he
gi ve » gia ve, gi de, gi he

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 ky nang x hoi. ((hieu van) OR (hieu va)) cau luc va hanh ((vi ve) or (gi ve)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang x hoi. ((hieu van) OR (hieu va)) cau luc va hanh ((vi ve) OR (gi ve)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang x hoi. ((hieu van) OR (hieu va)) cau luc va hanh ((vi ve) or (gi ve)) triet*".