Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hanh vai » hanh vi, hanh va, hanh tai
ky dang » ky danh
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
soc van » hoc van, oc van, sac van
tu sac » tu sach, tu cac, tu san
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ((ky dang) or (ky nang)) dai hoc. hieu vu cham soc van hanh vai ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ((ky dang) OR (ky nang)) dai hoc. hieu vu cham soc van hanh vai ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ((ky dang) or (ky nang)) dai hoc. hieu vu cham soc van hanh vai ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: tu sac ((ky dang) or (ky nang)) dai hoc. hieu vu cham soc van hanh vai ((cua te) OR (cua tu))*.