Perhaps you should try some spelling variations:
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu va » hieu qua
dang co » dong co, dang do, nang co
dung co » dung cho, dung cong, dung cua
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
cua su » qua su
nuoc » quoc, duoc, ngoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky lang xa hoi. ((hieu va) or (lieu va)) dat nuoc va ((dang co) OR (dung co)) cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky lang xa hoi. ((hieu va) OR (lieu va)) dat nuoc va ((dang co) OR (dung co)) cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky lang xa hoi. ((hieu va) or (lieu va)) dat nuoc va ((dang co) OR (dung co)) cua su".
• Adding a wildcard symbol may retrieve word variants: tu sai ky lang xa hoi. ((hieu va) or (lieu va)) dat nuoc va ((dang co) OR (dung co)) cua su*.