Perhaps you should try some spelling variations:
dang hanh » dang thanh, ban hanh, dang van
dan hanh » dan khanh, dan thanh, ban hanh
hieu van » hieu va, thien van, lieu va
chu thuc » chua thuc, cuu thuc, thu thuc
tu sach » thu sach, su sach, te sach
van chu » van chi, van phu, van cau
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
cua tu » cua tuc, cua su, cua te
cua cu » cua chu, cua cau, cua su

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 y nang xa hoi. hieu van chu thuc ((dan hanh) or (dang hanh)) tu ((cua tu) OR (cua cu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu van chu thuc ((dan hanh) OR (dang hanh)) tu ((cua tu) OR (cua cu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. hieu van chu thuc ((dan hanh) or (dang hanh)) tu ((cua tu) OR (cua cu))".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu van chu thuc ((dan hanh) or (dang hanh)) tu ((cua tu) OR (cua cu))*.