Perhaps you should try some spelling variations:
thanh hoi » thanh hoai, thanh hoa, thanh hai
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
duc mau » duc hau, duc manh
duc van » duc va, duc manh, duc phan
chuc te » thuc te, chuc ke, chuc theo
y nang » ky nang, ly nang, v nang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang xa hoi. hieu van cam ((duc mau) or (((duc van) OR (duc tan)))) thanh hoi chuc te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu van cam ((duc mau) OR (((duc van) OR (duc tan)))) thanh hoi chuc te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. hieu van cam ((duc mau) or (((duc van) OR (duc tan)))) thanh hoi chuc te*".