Perhaps you should try some spelling variations:
khau thuong » khac thuong, khai thuong, khau thong
chap thuong » chan thuong, phan thuong, pham thuong
thuat bach » thuat sach, thuat mach, thuat tach
tri thuat » trien thuat, ki thuat, tri thuc
sach tri » sach tai, sach tren, sach truc
bach hoa » bach khoa, bach ha, cach hoan
te sach » toc sach

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 tri thuat bach hoa ((khau thuong) or (chap thuong))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tri thuat bach hoa ((khau thuong) OR (chap thuong))*.