Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
cua triet » cua viet, su triet, va triet
su sach » so sach, vu sach
nang ma » tang ma, sang ma, mang may
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
cam lo » nam lo, cam ly, cam o
lo gia » ho gia, co gia, do gia
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y ((nang ma) or (nang cao)) hoi. hieu va cam lo gia thanh tai ((cua triet) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang ma) OR (nang cao)) hoi. hieu va cam lo gia thanh tai ((cua triet) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang ma) or (nang cao)) hoi. hieu va cam lo gia thanh tai ((cua triet) or (cua te))*.