Perhaps you should try some spelling variations:
phap thong » phap phong, phap chong, pho thong
bien thuoc » bien thuc, trien thuoc, kien thuc
cach bien » cam bien, mach dien, sach tien
thuoc anh » thuoc thanh, thuoc dang, thuoc sach
khoa phap » khoa phau, khoan phai, khong phap
hoach tri » hoach toi, hoach hoi, hoach thu
nuoc sinh » nuoc kinh, thuoc sinh, nguoi sinh
sinh khoa » sinh hoc, sinh hoat
hoc thong » hoc thuong, hoc trong, hoc hong
anh khoa » doanh khoa, hang khoa
tri nuoc » thi nuoc, tri quoc, tri nguon
khoa hoc » hoa hoc
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: (( tu cach bien thuoc anh khoa phap thong ) or ( thu hoach tri nuoc sinh khoa hoc thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cach bien thuoc anh khoa phap thong ) OR ( thu hoach tri nuoc sinh khoa hoc thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu cach bien thuoc anh khoa phap thong ) or ( thu hoach tri nuoc sinh khoa hoc thong ))*.