Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
chat duc » chat xuc, chat doc, chet duoc
lai cua » dai cua, hai cua, lai chau
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
hieu ve » hieu van
sach ky » sach y, sach ty, sach kem
sang ma » tang ma, nang ma, sang tao
ma hoi » mai hoi, xa hoi, ma hoa
sac ky » cac ky, sai ky
cua te » cua tu

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