Perhaps you should try some spelling variations:
khang khuan » khang chan, khanh thuan, zhang chuan
pham thuoc » pham thuc, phap thuoc, pham thuong
xanh khoa » anh khoa, doanh khoa, nganh khoa
sach pham » sach tham, sach phat, sach phap
hoc sach » hoc sinh, hoc cac, hoc anh
sach tri » sach tai, sach tren, sach truc
thu xanh » thu canh, thu anh, thu oanh
khuan ha » chuan ha, khuan khoa, khuan thao
tri thu » tri thuc, thi thu, tri phu
khoa he » hoa he, khoa hoc, khong he
te sach » toc sach
ha thon » hoa thon, hoa thong, nha thong

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( hoc sach tri thu xanh khoa he thong ) or ( te sach pham thuoc khang khuan ha thon ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( hoc sach tri thu xanh khoa he thong ) OR ( te sach pham thuoc khang khuan ha thon )).
• Adding a wildcard symbol may retrieve word variants: (( hoc sach tri thu xanh khoa he thong ) or ( te sach pham thuoc khang khuan ha thon ))*.