Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
te sach » toc sach
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cau tre » cau tren, cau treo, cuu tre
cau tra » ca tra, cau ra, cau truc
y lang » o lang, _ lang, tay 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 xa hoi. ((hieu van) OR (hieu va)) pham duc va hanh di ((cau tre) or (cau tra))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y lang xa hoi. ((hieu van) OR (hieu va)) pham duc va hanh di ((cau tre) OR (cau tra)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y lang xa hoi. ((hieu van) OR (hieu va)) pham duc va hanh di ((cau tre) or (cau tra))".
• Adding a wildcard symbol may retrieve word variants: te sach y lang xa hoi. ((hieu van) OR (hieu va)) pham duc va hanh di ((cau tre) or (cau tra))*.