Perhaps you should try some spelling variations:
sach thue » sach thu, sach thieu, sach tham
cua triet » cua viet, su triet
thanh lam » thanh lap, hanh lam, thanh nam
va triet » va thiet, va trien, ve triet
va thanh » gia thanh, ban thanh, va tinh
cau duc » cao duc, cau luc, chu duc
nang ho » nang hoc, nang co, tang ho
ho hoi » hoc hoi, hoa hoi, hoi hoi
va cau » van cau, va cac, va dau

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 thue) or (sach y)) nang ho hoi. lieu va cau duc va thanh lam ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach thue) OR (sach y)) nang ho hoi. lieu va cau duc va thanh lam ((cua triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: tu ((sach thue) or (sach y)) nang ho hoi. lieu va cau duc va thanh lam ((cua triet) or (va triet))*.