Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
va thanh » gia thanh, ban thanh, va tinh
tu sach » thu sach, su sach, te sach
sach tu » sach thu, cach tu, sach ty
cua tre » cua te, cua triet, dua tren
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va
nang xa » nang x, lang xa, nang ma
tu nang » tru nang, tu nong, tu nano
cuu tre » cau tren, cau treo
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach tu nang xa hoi. ((hieu va) OR (hieu qua)) cam tuc va thanh lai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu nang xa hoi. ((hieu va) OR (hieu qua)) cam tuc va thanh lai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tu nang xa hoi. ((hieu va) OR (hieu qua)) cam tuc va thanh lai ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach tu nang xa hoi. ((hieu va) OR (hieu qua)) cam tuc va thanh lai ((cua tre) or (cuu tre))*.