Perhaps you should try some spelling variations:
kham luc » khai luoc, kham cuoc, nhan luc
mai khoi » mai khoa, tai khoa, cac khoi
te sach » toc sach
dau cua » day cua, cau cua, dan cua
vu kham » vu khanh
hieu vu » hieu va, hieu ve, hieu su
sach ky » sac ky, sach y, sach ty
mai hoi » dai hoi, lai hoi, mai doi
ky lang » ky nang, ky dang, ky tang
luc va » duc va, tuc va, loc va
va dao » ca dao

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 lang ((mai hoi) OR (mai khoi)). hieu vu kham luc va dao ((dau cua) or (dai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang ((mai hoi) OR (mai khoi)). hieu vu kham luc va dao ((dau cua) OR (dai cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky lang ((mai hoi) OR (mai khoi)). hieu vu kham luc va dao ((dau cua) or (dai cua)) te".
• Adding a wildcard symbol may retrieve word variants: te sach ky lang ((mai hoi) OR (mai khoi)). hieu vu kham luc va dao ((dau cua) or (dai cua)) te*.