Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
thanh lai » thanh hai, thanh loi, thanh tai
cau theo » cau thi, cau tao
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
hieu ve » hieu va, hieu van
cac tuc » cac toc, cac tu, cac tac
cua tre » cua te, cuu tre, cua triet
tu sach » thu sach, su sach, te sach
ve cac » va cac, vien cac
tuc va » thuc va, truc va, tuc xa
x hoi » xa hoi, o hoi, x ho

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 thu nang x hoi. hieu ve cac tuc va ((thanh lai) or (thanh lap)) ((cua tre) or (cau theo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thu nang x hoi. hieu ve cac tuc va ((thanh lai) OR (thanh lap)) ((cua tre) OR (cau theo)).
• Adding a wildcard symbol may retrieve word variants: tu sach thu nang x hoi. hieu ve cac tuc va ((thanh lai) or (thanh lap)) ((cua tre) or (cau theo))*.