Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
cua viet » ca viet, hoa viet, cua dieu
hanh lam » thanh lap, hanh kem, hanh va
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
duc van » duc va, duc tan, duc manh
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
hieu ve » hieu van
ty nang » ky nang, ty xang, ty hang
x hoi » xa hoi, o hoi, x ho

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 nang x hoi. ((hieu ve) OR (hieu va)) cham duc van hanh lam ((cua viet) or (cua vat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. ((hieu ve) OR (hieu va)) cham duc van hanh lam ((cua viet) OR (cua vat)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang x hoi. ((hieu ve) OR (hieu va)) cham duc van hanh lam ((cua viet) or (cua vat))".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. ((hieu ve) OR (hieu va)) cham duc van hanh lam ((cua viet) or (cua vat))*.