Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
cua tuc » cua duc, cua tu, cua thuoc
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
di cua » dai cua, doi cua, de 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 lang xa hoi. hieu vu cham soc ((van hanh) or (ban hanh)) di cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (thu sach)) ky lang xa hoi. hieu vu cham soc ((van hanh) OR (ban hanh)) di cua tuc.
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (thu sach)) ky lang xa hoi. hieu vu cham soc ((van hanh) or (ban hanh)) di cua tuc*.