Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
chat hoc » chat hoa, chat thom, cho hoc
danh dau » lanh dao, hang dau, danh tu
hieu van » hieu va, thien van, lieu va
chat soc » chat doc, chat song, nhat so
va danh » va dinh, va dan, va hanh
te sach » toc sach
y nang » ky nang, ly nang, v nang
dau va » dau ve, lau 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: te sach y nang x hoi. hieu van ((((chat soc) OR (chat hoc))) or (cham soc)) va danh dau va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang x hoi. hieu van ((((chat soc) OR (chat hoc))) OR (cham soc)) va danh dau va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang x hoi. hieu van ((((chat soc) OR (chat hoc))) or (cham soc)) va danh dau va triet".
• Adding a wildcard symbol may retrieve word variants: te sach y nang x hoi. hieu van ((((chat soc) OR (chat hoc))) or (cham soc)) va danh dau va triet*.