Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh lai » thanh hai, thanh lap, thanh loi
chat tuc » chat xuc, luat tuc, chat huu
nang mai » nang ma, nang tai, lang mai
xa thanh » va thanh, ha thanh, ta thanh
so sach » so sanh, bo sach, co sach
hieu va » lieu va, hieu qua
sach ly » sach y, sach lo, sach ty
hieu ve » hieu van
mai hoi » mai khoi, dai hoi, lai hoi
ly nang » ky nang, ly hang, ly vang
su viet » so viet

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ly nang mai hoi. ((hieu ve) or (hieu va)) chat tuc xa thanh lai ((cua triet) or (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ly nang mai hoi. ((hieu ve) OR (hieu va)) chat tuc xa thanh lai ((cua triet) OR (su viet)).
• Adding a wildcard symbol may retrieve word variants: so sach ly nang mai hoi. ((hieu ve) or (hieu va)) chat tuc xa thanh lai ((cua triet) or (su viet))*.