Perhaps you should try some spelling variations:
hanh loai » thanh hoai, thanh loan, phan loai
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
cham duc » pham duc, cham soc, pham duy
anh hanh » anh thanh, xanh hanh, anh anh
su sach » so sach, vu sach
loai ca » loai cay, loai cua, loai va
ca viet » va viet, co viet, hoa viet
y nang » ky nang, ly nang, v nang
x hoi » o hoi, x ho, 5 hoi

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 ((x hoi) OR (xa hoi)). hieu van cham duc anh hanh loai ca viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang ((x hoi) OR (xa hoi)). hieu van cham duc anh hanh loai ca viet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang ((x hoi) OR (xa hoi)). hieu van cham duc anh hanh loai ca viet*.