Perhaps you should try some spelling variations:
thanh cac » hanh cac, thanh bac, thanh ca
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
so sach » so sanh, bo sach, co sach
sach ky » sac ky, sach y, sach ty
mai hoi » mai khoi, dai hoi, mai doi
lai hoi » dai hoi, lai hoa, lai roi
nam luc » nang luc, nhan luc, nam thuc
cac cua » cach cua, cac qua, ca cua
luc va » duc va, tuc va, loc va
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: so sach ky nang ((mai hoi) OR (lai hoi)). hieu van nam luc va thanh cac cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky nang ((mai hoi) OR (lai hoi)). hieu van nam luc va thanh cac cua te".
• Adding a wildcard symbol may retrieve word variants: so sach ky nang ((mai hoi) OR (lai hoi)). hieu van nam luc va thanh cac cua te*.