Perhaps you should try some spelling variations:
khan thong » khap thong, khau thong, nhan thong
sach tien » sach tren, sach thieu
tien thuc » trien thuc, kien thuc, bien thuc
thuc hang » thuc hanh, thu hang, phuc hang
cach thuc » anh thuc, cac thu
thuc phuc » thuc thuc, thuc phu, thuat phuc
khoan tho » khoang thoi, khoan nhoi, khoang thi
tho thong » theo thong, pho thong, tao thong
hang kho » hang khoa, khang kho, hang cho
kho khan » khoa kham, khoa than
phuc cac » phuc cam, phuc ca, phuc cham
te sach » toc sach
tu cach » tu cac

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 tien thuc hang kho khan thong ) or ( tu cach thuc phuc cac khoan tho thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach tien thuc hang kho khan thong ) OR ( tu cach thuc phuc cac khoan tho thong )).
• Adding a wildcard symbol may retrieve word variants: (( te sach tien thuc hang kho khan thong ) or ( tu cach thuc phuc cac khoan tho thong ))*.