Perhaps you should try some spelling variations:
khac xuong » phan xuong
sach tham » sach nha
tham thuc » nham thuc, pham thuc, tam thuc
thuc hang » thuc hanh, thu hang, phuc hang
hang khoa » dung khoa
khoa khac » khoa kham, khoanh khac, khoa hoc
phu thong » pho thong, phap thong, khau thong
thuc anh » thuc hanh, thuy anh, thu anh
anh khoa » doanh khoa
khoa phu » khoa phau, khoa thu, hoa phu
te sach » toc sach
tu sach » thu sach, su sach, tu cach
sach va » sach xa, sach ha, sach dao

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 tham thuc hang khoa khac xuong ) or ( tu sach va thuc anh khoa phu thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach tham thuc hang khoa khac xuong ) OR ( tu sach va thuc anh khoa phu thong )).
• Adding a wildcard symbol may retrieve word variants: (( te sach tham thuc hang khoa khac xuong ) or ( tu sach va thuc anh khoa phu thong ))*.