Perhaps you should try some spelling variations:
khap thong » phap thong, khau thong, khac thuong
phan cong » thanh cong
thuc hach » thuc hanh, chuc hach, thuc cach
bach khoa » anh khoa
khoa khap » khoa kham, khoa khac, kho khan
sach tri » sach tai, sach tren, sach bai
tri thuc » tri tue
hach hoa » hoach hoa, hanh hoa, bach hoa
hoa phan » hoa dan, co phan
tu sach » thu sach, su sach, te sach
tri vu » tri va, thi vu, tri du

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 tri thuc hach hoa phan cong ) or ( tu sach tri vu bach khoa khap thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu sach tri thuc hach hoa phan cong ) OR ( tu sach tri vu bach khoa khap thong )).
• Adding a wildcard symbol may retrieve word variants: (( tu sach tri thuc hach hoa phan cong ) or ( tu sach tri vu bach khoa khap thong ))*.