Perhaps you should try some spelling variations:
cach khong » cach phong, cac phong, bach khang
thuc cach » thuoc sach, truoc cach, thuc hanh
thai thuc » thai thuy, thai tuc, tham thuc
thu sanh » thu canh, thu san, thu sinh
sanh tai » sang tai, hanh tai, anh tai
tai thuc » tri thuc, dai thuc, thi thuc
khong he » khong khi, hong ha, khong _
sac thai » rac thai, sach tham, toc thai
thu sac » thu sach, thu san, thu xac

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thu sanh tai thuc cach khong he thong ) or ( thu sac thai thuc cach khong he thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu sanh tai thuc cach khong he thong ) OR ( thu sac thai thuc cach khong he thong )).
• Adding a wildcard symbol may retrieve word variants: (( thu sanh tai thuc cach khong he thong ) or ( thu sac thai thuc cach khong he thong ))*.