Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hanh dao » lanh dao, thanh dat, thanh dam
hieu va » lieu va, hieu qua
su sach » vu sach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
so sach » so sanh, bo sach, co sach
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
dao su » dao suu, dan su, cao su
va cau » van cau, va cac, va dau

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky lang xa hoi. hieu va cau ((xuc va) OR (tuc va)) hanh dao su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) ky lang xa hoi. hieu va cau ((xuc va) or (tuc va)) hanh dao su triet~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (so sach)) ky lang xa hoi. hieu va cau ((xuc va) or (tuc va)) hanh dao su triet*.