Perhaps you should try some spelling variations:
khac xuong » phan xuong
thuoc bach » thuoc sach, thuoc ban, truc bach
hanh doan » hanh doanh, thanh toan, thinh doan
doan khac » doan hai, doan hay
bai thuoc » ban thuoc, bai hoc, cay thuoc
bach khoa » anh khoa
phu thong » pho thong, phap thong, khau thong
sach dai » sach dao, sach dat, sach dau
dai thuc » dan thuc, dai thu, dai thua
sach bai » sach dao, cac bai, sach xa
khoa phu » khoa phau, khoa thu, hoa phu
te sach » toc sach
tu sach » thu sach, su sach, tu cach

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