Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
van hanh » van thanh, ban hanh, van anh
hanh lam » thanh lap, hanh kem, hanh va
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, te sach, tu cach
su sach » so sach, vu sach
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
va cham » va chat, va tham
duc van » duc va, duc tan, duc manh
lam cua » nam cua, lam chat
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) OR (su sach)) ty nang x hoi. hieu va cham duc van hanh lam cua viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (su sach)) ty nang x hoi. hieu va cham duc van hanh lam cua viet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (su sach)) ty nang x hoi. hieu va cham duc van hanh lam cua viet*.