Perhaps you should try some spelling variations:
pham chuc » pham duc, pham huu, kham chua
cua triet » cua viet, su triet
doc sach » hoc sach, toc sach, nuoc sach
nang mai » nang ma, nang tai, lang mai
hanh lai » hanh lam, hanh tai, thanh lap
va triet » va thiet, va trien, ve triet
sach ky » sac ky, sach y, sach ty
mai hoi » mai khoi, dai hoi, lai hoi
hieu vi » hieu voi, hieu va, hieu ve
chuc va » thuc va, thuc vat
va hanh » van hanh, va thanh, va danh

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach ky nang mai hoi. hieu vi pham chuc va hanh lai ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ky nang mai hoi. hieu vi pham chuc va hanh lai ((cua triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: doc sach ky nang mai hoi. hieu vi pham chuc va hanh lai ((cua triet) or (va triet))*.