Perhaps you should try some spelling variations:
manh phan » mach phan, anh phan, hanh phan
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
soc manh » suc manh, ho manh, duc manh
su sach » so sach, vu sach
y nang » ky nang, ly nang, v nang
lap ca » lap cua, lap va, lap xa
lap da » lap dat, lap dan, lap va
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 soc manh phan ((lap ca) OR (lap da)) viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang x hoi. hieu van cham soc manh phan ((lap ca) OR (lap da)) viet".
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu van cham soc manh phan ((lap ca) OR (lap da)) viet*.