Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
cua triet » cua viet, su triet, va triet
te sach » toc sach
sach ty » sach y, sach tu, sach thu
nang ma » tang ma, sang ma, mang may
hieu ve » hieu va, hieu van
ve chay » ve chat, de chay, ve cham
dua ban » dia ban, cua ban, qua ban
cua tre » cua te, cuu tre, dua tren

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 ty ((nang ma) OR (nang cao)) hoa. hieu ve chay dua ban thanh dai ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang ma) OR (nang cao)) hoa. hieu ve chay dua ban thanh dai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((nang ma) OR (nang cao)) hoa. hieu ve chay dua ban thanh dai ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((nang ma) OR (nang cao)) hoa. hieu ve chay dua ban thanh dai ((cua tre) or (cua triet))*.