Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
dang xay » dang van, van xay
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
vai cua » dai cua, hai cua, lai cua
soc van » hoc van, oc van, sac van
hieu vu » hieu va, hieu su, dieu vu
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, lang van
cua tu » cua tuc, cua su, cua cu

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