Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
su triet » su viet, su tien, ve triet
xang ma » tang ma, nang ma, sang ma
sach ty » sach tu, sach thu, xach tay
va cham » va chat, va tham
hieu va » lieu va, hieu qua
ma hoi » mai hoi, xa hoi, ma hoa
soc va » hoc va, loc va, goc va
doc va » duoc va, hoc va, duc 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) or (sach y)) xang ma hoi. hieu va cham ((soc va) or (doc va)) hanh lai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ty) OR (sach y)) xang ma hoi. hieu va cham ((soc va) OR (doc va)) hanh lai su triet.
• Adding a wildcard symbol may retrieve word variants: thu ((sach ty) or (sach y)) xang ma hoi. hieu va cham ((soc va) or (doc va)) hanh lai su triet*.