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

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