Perhaps you should try some spelling variations:
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
so sanh » do sanh
sanh ty » sach ty, canh tay
lang ha » long ha
hieu vu » hieu va, hieu ve, hieu su
vu cham » va cham, vu kham, tu cham
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh ty ((nang cao) or (lang ha)) hoi. hieu vu cham soc ((van hanh) OR (ban hanh)) vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ty ((nang cao) OR (lang ha)) hoi. hieu vu cham soc ((van hanh) OR (ban hanh)) vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh ty ((nang cao) or (lang ha)) hoi. hieu vu cham soc ((van hanh) OR (ban hanh)) vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: so sanh ty ((nang cao) or (lang ha)) hoi. hieu vu cham soc ((van hanh) OR (ban hanh)) vi cuu tre*.