Perhaps you should try some spelling variations:
manh hanh » xanh hanh, danh thanh, minh thanh
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
cham suc » cham soc, cham cuu, cao suc
loai cua » lai cua, loai ca, loai chat
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
loai va » loai nam
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 cham suc manh hanh ((loai cua) or (loai va)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu van cham suc manh hanh ((loai cua) OR (loai va)) viet.
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu van cham suc manh hanh ((loai cua) or (loai va)) viet*.