Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
va hanh » van hanh, va thanh, va danh
cua tre » cua te, dua tren, cua thep
cuu tre » cau tren, cau treo
y nang » ky nang, ly nang, v nang
soc va » hoc va, loc va, doc va

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 y nang xa hoi. hieu ve cham soc va hanh vi ((((cua tre) OR (cuu tre))) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu ve cham soc va hanh vi ((((cua tre) OR (cuu tre))) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang xa hoi. hieu ve cham soc va hanh vi ((((cua tre) OR (cuu tre))) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu ve cham soc va hanh vi ((((cua tre) OR (cuu tre))) or (cua triet))*.