Perhaps you should try some spelling variations:
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
hieu va » lieu va, hieu qua
cac loc » cac lop, cac toc, cac hoc
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
tu san » thu san, tu ban, vu san
tu can » tu ban, tu cac, thu canh
loc va » hoc va, luc va
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: ((tu san) or (tu can)) ky lang xa hoi. hieu va cac loc va hanh ((vi cua) OR (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu san) OR (tu can)) ky lang xa hoi. hieu va cac loc va hanh ((vi cua) OR (vai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu san) or (tu can)) ky lang xa hoi. hieu va cac loc va hanh ((vi cua) OR (vai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((tu san) or (tu can)) ky lang xa hoi. hieu va cac loc va hanh ((vi cua) OR (vai cua)) tre*.