Perhaps you should try some spelling variations:
mai khoi » mai khoa, tai khoa, cac khoi
tu sach » thu sach, su sach, te sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
mai hoi » dai hoi, lai hoi, mai doi
hieu ve » hieu va, hieu van
tai cua » thai cua, tri cua, dai cua
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
va dau » va dao

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 ly nang ((mai hoi) or (mai khoi)). hieu ve cam xuc va dau ((tai cua) OR (tai cuc)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly nang ((mai hoi) OR (mai khoi)). hieu ve cam xuc va dau ((tai cua) OR (tai cuc)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ly nang ((mai hoi) or (mai khoi)). hieu ve cam xuc va dau ((tai cua) OR (tai cuc)) tre*".