Perhaps you should try some spelling variations:
hang tien » thang tien, bang tien, hang dien
tu sach » thu sach, su sach, te sach
cam vuc » cam xuc
hang vi » hang va, hanh vi, hang di
vuc van » duc van, luc van, thuc van
su viet » so viet
sach va » sach xa, sach ha, sach dao
hieu ve » hieu va, hieu van
lai hoi » dai hoi, lai hoa, lai roi
mai hoi » mai khoi, dai hoi, mai doi
va nang » van nang, da nang, cam nang
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach va nang ((mai hoi) OR (lai hoi)). hieu ve cam vuc van ((hang vi) or (hang tien)) su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach va nang ((mai hoi) OR (lai hoi)). hieu ve cam vuc van ((hang vi) OR (hang tien)) su viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach va nang ((mai hoi) OR (lai hoi)). hieu ve cam vuc van ((hang vi) or (hang tien)) su viet*".