Perhaps you should try some spelling variations:
than xuong » phan xuong, than uong, thanh huong
thuoc dang » thuoc dung, thuoc khang, thuc dan
sach tranh » canh tranh
bai thuoc » ban thuoc, bai hoc, cay thuoc
dang khoa » dung khoa, hang khoa, dang khoi
khoa than » khoa luan, hoa thai, hoa tan
tranh hoc » thanh hoc, tranh cuoc, tranh duoc
sach bai » sach dao, cac bai, sach xa
ha thong » hoa thong, nha thong, he thong
tu sach » thu sach, su sach, tu cach
te sach » toc sach
hoc cac » hoc cao
nha ha » nhanh ha, nha khoa, nha hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu sach bai thuoc dang khoa than xuong ) or ( te sach tranh hoc cac nha ha thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach bai thuoc dang khoa than xuong ) OR ( te sach tranh hoc cac nha ha thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach bai thuoc dang khoa than xuong ) or ( te sach tranh hoc cac nha ha thong ))*.