Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
dang xay » dang van, van xay
van hanh » van thanh, ban hanh, van anh
so sach » so sanh, bo sach, co sach
soc van » hoc van, oc van, sac van
nang xa » nang x, lang xa, nang ma
vai cua » dai cua, hai cua, lai cua
hieu vu » hieu va, hieu su, dieu vu
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ky ((nang xa) or (dang xay)) hoi. ((hieu vu) OR (hieu ve)) cham soc van hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ky ((nang xa) OR (dang xay)) hoi. ((hieu vu) OR (hieu ve)) cham soc van hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ky ((nang xa) or (dang xay)) hoi. ((hieu vu) OR (hieu ve)) cham soc van hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: so sach ky ((nang xa) or (dang xay)) hoi. ((hieu vu) OR (hieu ve)) cham soc van hanh vai cua te*.