Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, va danh
vu cham » va cham, vu kham, tu cham
hieu vu » hieu va, hieu ve, hieu su
sach ty » sach y, sach tu, sach thu
tao hoi » tao khoi, tay hoi, thao hoc
ty sang » ty xang, ty hang, duy sang
soc va » hoc va, loc va, doc va
cua tu » cua tuc, cua su, cua cu

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

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