Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thu sach » thuat sach, thuoc sach, thu hoach
ban hanh » ban hang
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va giao » van giao, va giai, va gia
duc ban » duc tan, duc van, dua ban
cua tre » cua te, cuu tre, dua tren
y nang » ky nang, ly nang, v nang

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