Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
sach thu » sach thue, sach thieu, sach tham
vat hanh » vat thanh, van hanh, va hanh
cau thuc » cau truc, cuu thuc, can thuc
hanh va » hang va, hanh vi
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
sai ky » sac ky
va cau » van cau, va cac, va dau
va va » va van, va vua, va vai

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 thu) or (sach y))) or (sai ky)) lang xa hoi. hieu va cau thuc vat hanh va va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((((sach thu) OR (sach y))) OR (sai ky)) lang xa hoi. hieu va cau thuc vat hanh va va triet.
• Adding a wildcard symbol may retrieve word variants: tu ((((sach thu) or (sach y))) or (sai ky)) lang xa hoi. hieu va cau thuc vat hanh va va triet*.