Perhaps you should try some spelling variations:
phap thong » phap phong, phap chong, pho thong
than xuong » phan xuong, than uong, thanh huong
sach tren » sach tien, sach tranh
tren thuc » trien thuc, tron thuc, trinh thuc
khoa phap » khoa phau, khoan phai, khong phap
khoa than » khoa luan, hoa thai, hoa tan
thuc dan » thuc hanh, hoc dan, thuc vat
dan khoa » dang khoa, da khoa, san khoa
doc sach » hoc sach, toc sach, nuoc sach
sach tri » sach tai, sach truc, sach bai
tri thuc » tri tue
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 tren thuc dan khoa phap thong ) or ( doc sach tri thuc anh khoa than xuong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach tren thuc dan khoa phap thong ) OR ( doc sach tri thuc anh khoa than xuong )).
• Adding a wildcard symbol may retrieve word variants: (( te sach tren thuc dan khoa phap thong ) or ( doc sach tri thuc anh khoa than xuong ))*.