Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
khoan phai » khong phai, khoa phau, khoan hoi
phai thong » phap thong, phai tuong, phan thong
sach tranh » canh tranh
trinh thi » trinh tai, dinh thi, trinh tu
tranh tue » tranh tren, tranh cua, tran tu
khoan phu » khoa phu, khoa thu, khoa phau
phu thong » pho thong, phap thong, khau thong
thu hanh » thuc hanh, thu thanh, thuy hanh
thi cac » thi cuc, tai cac, thi tac
tu sach » thu sach, su sach, te sach
tue cac » tu cac, tuc cac, te cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thu hanh trinh thi cac khoan phai thong ) or ( tu sach tranh tue cac khoan phu thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu hanh trinh thi cac khoan phai thong ) OR ( tu sach tranh tue cac khoan phu thong )).
• Adding a wildcard symbol may retrieve word variants: (( thu hanh trinh thi cac khoan phai thong ) or ( tu sach tranh tue cac khoan phu thong ))*.