Perhaps you should try some spelling variations:
thien van » thi van
thanh van » thanh san, thanh toan, thanh phan
tru nang » tra nang, tri nang, truc nano
hieu van » hieu va, lieu va, hieu ve
ve triet » va trien, su triet
tu sach » thu sach, su sach, te sach
tu nang » tu nong, tu nano, tu lang
cac toc » cac toi, cac nuoc, cac thoi
toc gia » toc giay, tac gia, quoc gia
van ve » van de, ban ve, van le

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((tu nang) OR (tru nang)) x ho. ((hieu van) or (thien van)) cac toc gia thanh van ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((tu nang) OR (tru nang)) x ho. ((hieu van) OR (thien van)) cac toc gia thanh van ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((tu nang) OR (tru nang)) x ho. ((hieu van) or (thien van)) cac toc gia thanh van ve triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((tu nang) OR (tru nang)) x ho. ((hieu van) or (thien van)) cac toc gia thanh van ve triet*.