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
tay lang » tai lang, tay tang, tay quang
van lam » van nam
lam duc » lam duoc, pham duc, nam duoc
danh va » doanh va, hanh va, anh va
te sach » toc sach
ha hoi » hoa hoi, ha noi, xa hoi
y lang » o lang, _ lang, yen lang

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