Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
cham duc » pham duc, cham soc, pham duy
hanh de » hanh ve, hanh kem
va hanh » van hanh, va thanh, va danh
hieu so » thieu so
sach tu » sach thu, cach tu, sach ty
tu sach » thu sach, su sach, te sach
tu nang » tru nang, tu nong, tu nano
hieu va » lieu va, hieu qua
de cua » le cua, te cua, dieu cua
o hoi » co hoi, o hoc, o hai

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 tu nang ((5 hoi) or (o hoi)). ((hieu va) or (hieu so)) cham duc va hanh de cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tu nang ((5 hoi) OR (o hoi)). ((hieu va) OR (hieu so)) cham duc va hanh de cua viet.
• Adding a wildcard symbol may retrieve word variants: tu sach tu nang ((5 hoi) or (o hoi)). ((hieu va) or (hieu so)) cham duc va hanh de cua viet*.