Perhaps you should try some spelling variations:
sach kem » hanh kem
thanh do » thanh de, thanh pho, thanh hoa
thanh di » thanh doi, thanh de, thanh dinh
nam mua » nam cua, nam qua, nam xua
hieu va » lieu va, hieu qua
va nam » van nam, ha nam, va nay
mua va » vua va, sua va, xua va
cua tu » cua tuc, cua su, cua cu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach kem) or (sach y)) nang x hoi. hieu va nam mua va ((thanh di) OR (thanh do)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach kem) OR (sach y)) nang x hoi. hieu va nam mua va ((thanh di) OR (thanh do)) cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach kem) or (sach y)) nang x hoi. hieu va nam mua va ((thanh di) OR (thanh do)) cua tu*".