Perhaps you should try some spelling variations:
sach trien » sach tien, sach tren, sach thieu
trien thuc » trien thuoc, tren thuc, trien thuat
khau thong » khau thuong, khap thong, khau tong
thuc hang » thuc hanh, thu hang, phuc hang
thuc phuc » thuc thuc, thuc phu, thuat phuc
phuc cham » phuc cam, phuc chau, thuc pham
cham khoi » cham hoi, pham khoa, chai khoa
pho thong » he thong
hang kho » hang khoa, khang kho, hang cho
kho khau » kho khan, khoa kham, khoa phau
cac thuc » cach thuc, cac thu, can thuc
khoi pho » khoi tho, khoi khoa, hoc pho
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 trien thuc hang kho khau thong ) or ( tu cac thuc phuc cham khoi pho thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach trien thuc hang kho khau thong ) OR ( tu cac thuc phuc cham khoi pho thong )).
• Adding a wildcard symbol may retrieve word variants: (( te sach trien thuc hang kho khau thong ) or ( tu cac thuc phuc cham khoi pho thong ))*.