Perhaps you should try some spelling variations:
ban hanh » ban hang
thu sach » tu sach, thuat sach, thuoc sach
van hanh » van thanh, van anh, van ban
dang xay » dang van, van xay
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
cua tuc » cua duc, cua tu, cua thuoc
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
vi cua » vai cua, di cua
tu sac » tu sach, tu cac, tu san

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) or (thu sach)) ky dang xay hoi. hieu vu cham soc ((van hanh) or (ban hanh)) vi cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (thu sach)) ky dang xay hoi. hieu vu cham soc ((van hanh) OR (ban hanh)) vi cua tuc.
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (thu sach)) ky dang xay hoi. hieu vu cham soc ((van hanh) or (ban hanh)) vi cua tuc*.