Perhaps you should try some spelling variations:
xach tay » canh tay
va thanh » gia thanh, ban thanh, va tinh
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va nam » van nam, ha nam, va nay
thu va » thuc va, thue va, tu va
va cua » va chua, via cua, ma cua
ca cua » co cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((xach tay) or (sach thieu)) lang xa hoi. hieu va nam thu va thanh ((va cua) OR (ca cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((xach tay) OR (sach thieu)) lang xa hoi. hieu va nam thu va thanh ((va cua) OR (ca cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((xach tay) or (sach thieu)) lang xa hoi. hieu va nam thu va thanh ((va cua) OR (ca cua)) triet".
• Adding a wildcard symbol may retrieve word variants: toc ((xach tay) or (sach thieu)) lang xa hoi. hieu va nam thu va thanh ((va cua) OR (ca cua)) triet*.