Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
cham duc » pham duc, cham soc, pham duy
cua tre » cua te, cuu tre, cua triet
va hanh » van hanh, va danh, ban hanh
hieu va » lieu va, hieu qua
va cham » va chat, va tham
ky dang » ky nang, ky danh
ky lang » ky nang, ky tang, tay lang
ha hoi » hoa hoi, ha noi, xa hoi
vi cua » vai cua, di cua
su sac » su sach, su cac, su xac

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ((ky lang) or (ky dang)) ha hoi. hieu va cham duc ((va hanh) OR (va thanh)) vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ((ky lang) OR (ky dang)) ha hoi. hieu va cham duc ((va hanh) OR (va thanh)) vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ((ky lang) or (ky dang)) ha hoi. hieu va cham duc ((va hanh) OR (va thanh)) vi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sac ((ky lang) or (ky dang)) ha hoi. hieu va cham duc ((va hanh) OR (va thanh)) vi cua tre*.