Perhaps you should try some spelling variations:
khai luoc » hai huoc, hai luom, dai luoc
hang dau » hang va, hang tai
va hang » van hang, va nang, va lang
luoc va » nuoc va, duoc va, loc va
va khai » van khai, va khao, va kha
hieu va » lieu va, hieu qua
lai hoi » dai hoi, lai hoa, lai roi
sach ky » sach y, sach ty, sach kem
mai hoi » mai khoi, dai hoi, mai doi
tu tien » tu tieng, thu tien, tu thien
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ky) or (sac ky)) nang ((mai hoi) OR (lai hoi)). hieu va khai luoc va hang dau tu tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sac ky)) nang ((mai hoi) OR (lai hoi)). hieu va khai luoc va hang dau tu tien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sac ky)) nang ((mai hoi) OR (lai hoi)). hieu va khai luoc va hang dau tu tien".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sac ky)) nang ((mai hoi) OR (lai hoi)). hieu va khai luoc va hang dau tu tien*.