Perhaps you should try some spelling variations:
chau triet » cau triet, cua triet, cau trieu
thu sach » tu sach, thuat sach, thuoc sach
hanh lai » hanh lam, hanh tai, thanh lap
sach ty » sach y, sach tu, sach thu
xang ma » tang ma, nang ma, sang ma
hieu va » hieu qua
ma hoi » mai hoi, xa hoi, ma hoa
soc va » loc va, doc va, goc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty xang ma hoi. ((hieu va) OR (lieu va)) chat ((soc va) or (hoc va)) hanh lai chau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty xang ma hoi. ((hieu va) OR (lieu va)) chat ((soc va) OR (hoc va)) hanh lai chau triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ty xang ma hoi. ((hieu va) OR (lieu va)) chat ((soc va) or (hoc va)) hanh lai chau triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ty xang ma hoi. ((hieu va) OR (lieu va)) chat ((soc va) or (hoc va)) hanh lai chau triet*.