Perhaps you should try some spelling variations:
khoanh khac » khoa khac
phan thuong » hang thuong, phan xuong
cac khoanh » cac khoan, cac thanh, cac doanh
khac thong » khac thuong, khac trong, khap thong
cach thoi » cac thoi, cach thuc, cach noi
thoi thuc » choi thuc, thai thuc, thi thuc
thuc cach » thuoc sach, truoc cach, thuc hanh
cach phap » cach pha, cach phat, sach phap
phap phan » phap phat, phap hoan, phap luan
sach truc » cach thuc, sach tren, sach thu
thu sach » tu sach, thuat sach, thuoc sach
truc tac » truc tai, truc bach, truc giac
tu cach » tu cac
tac cac » thac cac, tai cac, tap cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu cach thoi thuc cach phap phan thuong ) or ( thu sach truc tac cac khoanh khac thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cach thoi thuc cach phap phan thuong ) OR ( thu sach truc tac cac khoanh khac thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu cach thoi thuc cach phap phan thuong ) or ( thu sach truc tac cac khoanh khac thong ))*.