Perhaps you should try some spelling variations:
kham tuc » nham thuc, pham thuc, kham cuoc
te sach » toc sach
sach ky » sac ky, sach y, sach ty
day cua » dai cua
dau cua » dai cua, cau cua, dan cua
va doan » va doanh, van doan, va dan
vu kham » vu khanh
hieu vu » hieu va, hieu ve, hieu su
mai hoi » mai khoi, dai hoi, lai hoi
tuc va » thuc va, truc va, tuc xa
ma hoi » xa hoi, ma hoa, me hoi

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