Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
va thanh » ban thanh, va tinh, le thanh
mai hoi » mai khoi, lai hoi, mai doi
tai cua » thai cua, tai cuc, tri cua
dai hoi » dai hoc, dai hai, dai moi
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
ve cac » va cac, vien cac
y nang » ky nang, ly nang, v nang
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 y nang ((mai hoi) OR (dai hoi)). hieu ve cac xuc ((va thanh) or (gia thanh)) tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang ((mai hoi) OR (dai hoi)). hieu ve cac xuc ((va thanh) OR (gia thanh)) tai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang ((mai hoi) OR (dai hoi)). hieu ve cac xuc ((va thanh) or (gia thanh)) tai cua te".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang ((mai hoi) OR (dai hoi)). hieu ve cac xuc ((va thanh) or (gia thanh)) tai cua te*.