Perhaps you should try some spelling variations:
phap thong » phap phong, phap chong, pho thong
khap thong » khau thong, khac thuong, chap thuong
tham thuc » nham thuc, pham thuc, tam thuc
khoa phap » khoa phau, khoan phai, khong phap
thu sach » tu sach, thuat sach, thuoc sach
thuc anh » thuc hanh, thuy anh, thu anh
kho khap » kho khan, khoa kham, khoa khac
cac khoa » cac khoan, cac khoi, dac khoa
anh kho » anh khoa, anh tho, anh cho
su sach » so sach, vu sach
nha hoc » nha thuoc, khoa hoc, nha nuoc
hoc cac » hoc cao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu sach tham thuc anh kho khap thong ) OR ( su sach nha hoc cac khoa phap thong ))~.
• Adding a wildcard symbol may retrieve word variants: (( thu sach tham thuc anh kho khap thong ) or ( su sach nha hoc cac khoa phap thong ))*.