Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, ban hanh, van anh
tham xuc » tham nuoc, tham thuc, pham duc
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
te sach » toc sach
xuc van » duc van, luc van, vuc van
va tham » van tham, va cham, va thanh
v nang » va nang, vu nang, van nang
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) or (te sach)) v nang xa hoi. hieu va tham xuc van hanh ((vi ve) OR (gi ve)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (te sach)) v nang xa hoi. hieu va tham xuc van hanh ((vi ve) OR (gi ve)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (te sach)) v nang xa hoi. hieu va tham xuc van hanh ((vi ve) OR (gi ve)) triet".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (te sach)) v nang xa hoi. hieu va tham xuc van hanh ((vi ve) OR (gi ve)) triet*.