Perhaps you should try some spelling variations:
hanh phan » thanh phan, anh phan, hanh han
manh phan » mach phan, anh phan, thanh phan
hieu van » hieu va, thien van, lieu va
cham duc » pham duc, pham duy, phan duc
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 » xa hoi, o hoi, x ho

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. hieu van ((cham duc) or (cham soc)) ((manh phan) OR (hanh phan)) loai ca viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x hoi. hieu van ((cham duc) OR (cham soc)) ((manh phan) OR (hanh phan)) loai ca viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang x hoi. hieu van ((cham duc) or (cham soc)) ((manh phan) OR (hanh phan)) loai ca viet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu van ((cham duc) or (cham soc)) ((manh phan) OR (hanh phan)) loai ca viet*.