Perhaps you should try some spelling variations:
phau thong » phap thong, khau thong, phan thong
hanh khoa » hang khoa, anh khoa, hanh hoa
khoa phau » hoa phan, khoa kham, khoa than
thu canh » thuc hanh, thu cong, thu ban
canh dao » lanh dao, canh dan, hanh dao
tuc hanh » thuc hanh, tuc thanh, duc hanh
sach tai » sach bai, sach tham, sach dao
hoc sach » hoc sinh, hoc cac, hoc anh
sach hoa » sach ha, sach hoi, bach hoa
hoc cong » hoc co, cac cong, hoc dung
dao tuc » dao duc
tu sach » thu sach, su sach, te sach
tai hoc » thai hoc, dai hoc, bai hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thu canh dao tuc hanh khoa phau thong ) or ( tu sach tai hoc sach hoa hoc cong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu canh dao tuc hanh khoa phau thong ) OR ( tu sach tai hoc sach hoa hoc cong ))*.