Perhaps you should try some spelling variations:
cham luc » cham soc, nhan luc, cham cuu
van hanh » van thanh, ban hanh, van anh
hanh tri » thanh tri, hanh tai, hanh trinh
tu sach » thu sach, su sach, te sach
van hoe » van hoc, van hieu, van hien
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
luc van » luoc van, luu van, duc van
cua tuc » cua duc, cua thuoc, luat tuc
cua tu » cua su, cua cu, cua te

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 _ lang ((van hoe) OR (van hoa)). hieu ve cham luc van hanh tri ((cua tu) or (cua tuc))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach _ lang ((van hoe) OR (van hoa)). hieu ve cham luc van hanh tri ((cua tu) OR (cua tuc)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach _ lang ((van hoe) OR (van hoa)). hieu ve cham luc van hanh tri ((cua tu) or (cua tuc))".
• Adding a wildcard symbol may retrieve word variants: tu sach _ lang ((van hoe) OR (van hoa)). hieu ve cham luc van hanh tri ((cua tu) or (cua tuc))*.