Perhaps you should try some spelling variations:
phau thong » phap thong, phan thong, phan thuong
khau thong » khau thuong, khap thong, khau tong
khoa phau » hoa phan, khoa kham, khoa than
khoi khau » khoai chau, kho khan, khoa kham
sach dao » lanh dao
cac khoa » cac khoan, dac khoa, cao khoa
thuc cac » thuc cach, tuc cac, phuc cac
cac khoi » cac thoi, cac khoan, cach thoi
so sach » so sanh, bo sach, co sach
dao tro » dao tao, dao tru, bao tro
tro cac » tho cac, tao cac, tri cac
tu cach » tu cac
cach xa » sach xa, cac xa, cach ta
xa thuc » va thuc, xa phuc, a thuc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( so sach dao tro cac khoa phau thong ) or ( tu cach xa thuc cac khoi khau thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so sach dao tro cac khoa phau thong ) OR ( tu cach xa thuc cac khoi khau thong )).
• Adding a wildcard symbol may retrieve word variants: (( so sach dao tro cac khoa phau thong ) or ( tu cach xa thuc cac khoi khau thong ))*.