Perhaps you should try some spelling variations:
cua triet » su triet, va triet
thanh lai » thanh hai, thanh lap, thanh loi
hanh dau » hang dau, danh dau, han dau
thi hanh » thi thanh
va thanh » gia thanh, ban thanh, va tinh
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang 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 ky tang xa hoi. thi hanh dau tu va thanh lai ((cua triet) or (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang xa hoi. thi hanh dau tu va thanh lai ((cua triet) OR (cua viet)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang xa hoi. thi hanh dau tu va thanh lai ((cua triet) or (cua viet))*.