Perhaps you should try some spelling variations:
xanh hanh » danh thanh, ban hanh, van hanh
duc xanh » duc anh, duc manh, duc hanh
san viet » gian viet, anh viet
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
cham duc » pham duc, cham soc, pham duy
hanh lam » thanh lap, hanh kem, hanh va
ca viet » va viet, co viet, mai viet
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
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 van cham duc xanh hanh lam ((((ca viet) OR (san viet))) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu van cham duc xanh hanh lam ((((ca viet) OR (san viet))) OR (hoa viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang x hoi. hieu van cham duc xanh hanh lam ((((ca viet) OR (san viet))) or (hoa viet))*".