Perhaps you should try some spelling variations:
hoang san » hoang van, hoang son, hoang xuan
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
van chat » cao chat
quoc ban » quoc bao, quoc lan, quoc quan
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
xuc ban » duc ban, cuc ban, xuat ban
san cua » sang cua, ban cua, dan cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty nang xa hoi. hieu van chat ((xuc ban) OR (quoc ban)) hoang san cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty nang xa hoi. hieu van chat ((xuc ban) OR (quoc ban)) hoang san cua triet".
• Adding a wildcard symbol may retrieve word variants: so sach ty nang xa hoi. hieu van chat ((xuc ban) OR (quoc ban)) hoang san cua triet*.