Perhaps you should try some spelling variations:
dung doi » huong doi, dung tai, dung co
lang xa » lang ha, dang xay, lang van
doi cua » dai cua, hoi cua
xa dung » xay dung, xa dong, va dung
hieu va » lieu va, hieu qua
so sach » bo sach, co sach, hoc sach
ky lang » ky nang, ky dang, ky tang
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
cam tu » cam thu, nam tu, dam tu
tu xa » tu xay, tu va, te xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (((so sanh) OR (do sanh)))) ky lang xa hoi. hieu va cam tu xa dung doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (((so sanh) OR (do sanh)))) ky lang xa hoi. hieu va cam tu xa dung doi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (((so sanh) OR (do sanh)))) ky lang xa hoi. hieu va cam tu xa dung doi cua tre*".