Perhaps you should try some spelling variations:
manh thanh » danh thanh, minh thanh, manh thang
cua triet » cua viet, su triet, va triet
phan duc » pham duc, phan tu, phan dau
sach thu » sach thue, sach thieu, sach tham
thanh vi » hanh vi, thanh va, thanh ve
duc manh » suc manh, duc anh, duc minh
va phan » van phan, va phat, va phap
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
sang ma » tang ma, nang ma, sang tao
cuu tre » cua tre, cau tren, cau treo
ma hoi » mai hoi, xa hoi, ma hoa

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) or (sach thu)) sang ma hoi. hieu va phan duc manh thanh vi ((cua triet) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach thu)) sang ma hoi. hieu va phan duc manh thanh vi ((cua triet) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach thu)) sang ma hoi. hieu va phan duc manh thanh vi ((cua triet) or (cuu tre))*.