Perhaps you should try some spelling variations:
thanh doi » thanh loi, thanh moi, thanh do
su sach » so sach, vu sach
doi cuu » doi cua, doi cuoc
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo
nang xa » nang x, lang xa, nang ma
lang ha » long ha
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach thieu ((nang xa) or (lang ha)) hoi. hieu va cam ((xuc va) or (luc va)) thanh doi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thieu ((nang xa) OR (lang ha)) hoi. hieu va cam ((xuc va) OR (luc va)) thanh doi cuu tre.
• Adding a wildcard symbol may retrieve word variants: su sach thieu ((nang xa) or (lang ha)) hoi. hieu va cam ((xuc va) or (luc va)) thanh doi cuu tre*.