Perhaps you should try some spelling variations:
cach khuan » cac khoan, cach hoan
khoa thong » hoa thong, thoai thong, pho thong
phau thong » phap thong, khau thong, phan thong
cach thuc » anh thuc, cac thu
sach tren » sach tien, sach tranh
khoa phau » hoa phan, khoa kham, khoa than
thuc tue » thuc te, thuc que, thuc tre
tue cach » thuc cach, ve cach, cuu cach
cac khoa » cac khoan, cac khoi, dac khoa
tu cach » tu cac
tu sach » thu sach, su sach, te sach
tren ve » tren xe, tren he, tren vi
ve cac » va cac, vien 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 thuc tue cach khuan khoa thong ) or ( tu sach tren ve cac khoa phau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cach thuc tue cach khuan khoa thong ) OR ( tu sach tren ve cac khoa phau thong ))*.