Perhaps you should try some spelling variations:
sinh khoan » sinh khoa, sinh hoat, dinh khoa
khoan phai » khong phai, khoa phau, khoan hoi
phai thong » phap thong, phai tuong, phan thong
khoa phap » khoa phau, khong phap, hoa phan
hanh dao » lanh dao, thanh dat, thanh dam
anh khoa » doanh khoa, hang khoa
tu sach » thu sach, su sach, te sach
sach xa » sach dao, sach nha, sach bai
tu hanh » du hanh, lu hanh, thuc hanh
dao tuc » dao duc
tuc anh » tuc hanh, duc anh, tu anh
xa hoc » xa hoi, va hoc, xa hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu sach xa hoc sinh khoan phai thong ) or ( tu hanh dao tuc anh khoa phap tieng ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach xa hoc sinh khoan phai thong ) OR ( tu hanh dao tuc anh khoa phap tieng )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach xa hoc sinh khoan phai thong ) or ( tu hanh dao tuc anh khoa phap tieng ))*.