Perhaps you should try some spelling variations:
thue nang » thien nang, thuat nang, thi nang
hieu van » hieu va, thien van, lieu va
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, tu cach
te sach » toc sach
thu dan » thuc dan, thu dang, thu ban
hanh ve » hanh vi, hanh va
x hoi » xa hoi, o hoi, x ho

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) OR (te sach)) thue nang x hoi. hieu van nam thu dan ((hanh ve) or (hanh kem)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) thue nang x hoi. hieu van nam thu dan ((hanh ve) OR (hanh kem)) cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) thue nang x hoi. hieu van nam thu dan ((hanh ve) or (hanh kem)) cua viet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) thue nang x hoi. hieu van nam thu dan ((hanh ve) or (hanh kem)) cua viet*.