Perhaps you should try some spelling variations:
nhanh lang » nhanh quang, nhanh thang, nhan dang
lang cua » mang cua, hang cua, long cua
tai sao » tai san
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
tang xa » trang xa, tang ma, tang ha
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu tai sao ((tang xa) or (lang xa)) hoi. hieu ve cam ((xuc va) OR (luc va)) nhanh lang cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu tai sao ((tang xa) OR (lang xa)) hoi. hieu ve cam ((xuc va) OR (luc va)) nhanh lang cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu tai sao ((tang xa) or (lang xa)) hoi. hieu ve cam ((xuc va) OR (luc va)) nhanh lang cua tre".
• Adding a wildcard symbol may retrieve word variants: tu tai sao ((tang xa) or (lang xa)) hoi. hieu ve cam ((xuc va) OR (luc va)) nhanh lang cua tre*.