Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
sach thu » sach thue, sach thieu, sach tham
hanh lai » hanh lam, hanh tai, thanh lap
va hanh » van hanh, va thanh, va danh
ve pham » vi pham, v pham, ve phan
sach ty » sach y, sach tu, xach tay
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van

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 ty) or (sach thu)) nang xa hoi. hieu ve pham duc va hanh lai ((cua triet) OR (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach thu)) nang xa hoi. hieu ve pham duc va hanh lai ((cua triet) OR (va triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (sach thu)) nang xa hoi. hieu ve pham duc va hanh lai ((cua triet) OR (va triet))".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (sach thu)) nang xa hoi. hieu ve pham duc va hanh lai ((cua triet) OR (va triet))*.