Perhaps you should try some spelling variations:
khoan toan » khoan thanh, khoa than, hoa toan
han thuong » hang thuong, phan thuong, lan thuong
cach thuc » anh thuc, cac thu
sach tri » sach tai, sach tren, sach truc
tri phuc » tri thuc, tri phu, thi phuc
phuc cac » phuc cam, phuc ca, phuc cham
thuc tac » thuc tap, thuc tai, thuc lac
cac khoi » cac thoi, cach thoi, hoc khoi
khoi han » hoi han, khoi can, khoa than
su sach » so sach, vu sach
te cach » ve cach, te sach, tu cach
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: (( su sach tri phuc cac khoan toan thong ) or ( te cach thuc tac cac khoi han thuong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach tri phuc cac khoan toan thong ) OR ( te cach thuc tac cac khoi han thuong )).
• Adding a wildcard symbol may retrieve word variants: (( su sach tri phuc cac khoan toan thong ) or ( te cach thuc tac cac khoi han thuong ))*.