Perhaps you should try some spelling variations:
thien van » thi van
hanh dai » hanh tai, hanh dao, vanh dai
hieu van » hieu va, lieu va, hieu ve
ban hanh » ban hang
te sach » toc sach
cac ban » cac dan, cac van, can ban
cua tre » cua te, cua triet, dua tren
cam cac » ca cac, nam cac, cam chan
lang xa » lang ha, dang xay, lang van
cuu tre » cau tren, cau treo
sach o » sach lo, sac o, sach y
o lang » hoa lang, hoi 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 o lang xa hoi. ((hieu van) or (thien van)) cam cac ban hanh dai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach o lang xa hoi. ((hieu van) OR (thien van)) cam cac ban hanh dai ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach o lang xa hoi. ((hieu van) or (thien van)) cam cac ban hanh dai ((cua tre) OR (cuu tre))*".