Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van ban
kham soc » cham soc, kham cuoc, ham so
dang xay » dang van, van xay
tu sach » thu sach, su sach, te sach
van anh » van thanh, tuan anh, van minh
vu kham » vu khanh
hieu vu » hieu va, hieu ve, hieu su
sach ty » sach y, sach tu, sach thu
mang xa » lang xa, mang may, mang cua
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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 ty ((mang xa) or (dang xay)) hoi. hieu vu kham soc ((van hanh) OR (van anh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((mang xa) OR (dang xay)) hoi. hieu vu kham soc ((van hanh) OR (van anh)) vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((mang xa) or (dang xay)) hoi. hieu vu kham soc ((van hanh) OR (van anh)) vi cua tre*".