Perhaps you should try some spelling variations:
kham thong » khap thong, khau thong, pham thuong
thuoc bach » thuoc sach, thuoc ban, truc bach
canh khoa » anh khoa, xanh khoa, doanh khoa
khoa kham » kho khan, khoa than
nha thuoc » nha nuoc, nhan thuc, nha hoc
bach khoa » anh khoa
pho thong » he thong
thu canh » thuc hanh, thu cong, thu ban
khoa pho » khoa phu, khoa khoa, khoa phau
anh thi » anh tho, dinh thi, dang thi
tot nha » tot nhat, toa nha, mot nha
tu anh » tu hanh, tu manh, thu anh
tu tot » tu cot, tu txt

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: (( tu anh thi thu canh khoa kham thong ) OR ( tu tot nha thuoc bach khoa pho thong ))~.
• Adding a wildcard symbol may retrieve word variants: (( tu anh thi thu canh khoa kham thong ) or ( tu tot nha thuoc bach khoa pho thong ))*.