Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
doanh van » doan van, doanh va, doanh ban
hieu van » hieu va, thien van, lieu va
toc sach » hoc sach, doc sach, thuoc sach
van lam » van nam
lam duc » lam duoc, pham duc, nam duoc
lang ha » long ha
danh va » doanh va, anh va, dan va
hanh va » hang va, hanh vi
ha hoi » hoa hoi, ha noi, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach _ lang ha hoi. hieu van lam duc va ((doanh van) or (((danh va) OR (hanh va)))) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach _ lang ha hoi. hieu van lam duc va ((doanh van) OR (((danh va) OR (hanh va)))) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach _ lang ha hoi. hieu van lam duc va ((doanh van) or (((danh va) OR (hanh va)))) cua triet".
• Adding a wildcard symbol may retrieve word variants: toc sach _ lang ha hoi. hieu van lam duc va ((doanh van) or (((danh va) OR (hanh va)))) cua triet*.