Perhaps you should try some spelling variations:
quan soc » quan doc, quang hoc, quan quoc
hieu van » hieu va, thien van, lieu va
va hanh » van hanh, va thanh, va danh
quan so » quan su, quan ao, quan doi
luu tre » luu tru, cuu tre, luy tre
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
te sach » toc sach
vi luu » vi lua
te sac » te cac, te san

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sac) or (te sach)) ky lang xa hoi. hieu van ((quan soc) OR (quan so)) va hanh vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te sach)) ky lang xa hoi. hieu van ((quan soc) OR (quan so)) va hanh vi luu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) or (te sach)) ky lang xa hoi. hieu van ((quan soc) OR (quan so)) va hanh vi luu tre".
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (te sach)) ky lang xa hoi. hieu van ((quan soc) OR (quan so)) va hanh vi luu tre*.