Perhaps you should try some spelling variations:
khau thong » khau thuong, khap thong, khau tong
sach truc » cach thuc, sach tren, sach thu
truc thuc » truc thuoc, thuc thuc, truc thuy
phu thong » pho thong, phap thong, phan thong
thuc anh » thuc hanh, thuy anh, thu anh
anh khoa » doanh khoa, hang khoa
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 truc thuc anh khoa ((phu thong) or (khau thong))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach truc thuc anh khoa ((phu thong) OR (khau thong))*.