Perhaps you should try some spelling variations:
dang xay » dang van, van xay
lang xa » lang ha, lang van
sach ky » sac ky, sach y, sach ty
qua cam » qua cham, qua cac, qua ca
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
vu sach » vu bach, su sach, vu khach
tuc va » thuc va, truc va, tuc xa
vi cua » di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky ((lang xa) OR (dang xay)) hoi. hieu qua cam tuc va hanh ((vi cua) or (vai cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky ((lang xa) OR (dang xay)) hoi. hieu qua cam tuc va hanh ((vi cua) OR (vai cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky ((lang xa) OR (dang xay)) hoi. hieu qua cam tuc va hanh ((vi cua) or (vai cua)) triet".
• Adding a wildcard symbol may retrieve word variants: vu sach ky ((lang xa) OR (dang xay)) hoi. hieu qua cam tuc va hanh ((vi cua) or (vai cua)) triet*.