Perhaps you should try some spelling variations:
chet nuoc » chet duoc, che duoc, chua nuoc
hanh lai » hanh lam, hanh tai, thanh lap
te sach » toc sach
hieu se » hieu ve, hieu so, hieu su
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
ma hoi » mai hoi, xa hoi, me hoi

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 _ sang ((ma hoi) OR (ma hoa)). hieu se chet nuoc va hanh lai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach _ sang ((ma hoi) OR (ma hoa)). hieu se chet nuoc va hanh lai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach _ sang ((ma hoi) OR (ma hoa)). hieu se chet nuoc va hanh lai ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sach _ sang ((ma hoi) OR (ma hoa)). hieu se chet nuoc va hanh lai ((cua tre) or (cuu tre))*.