Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
soc ban » hoc ban, coc ban, so ban
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
hieu vu » hieu ve, hieu su, dieu vu
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
cuu tre » cua tre, cau tren, cau treo

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 ty nang xa hoi. ((hieu vu) or (hieu va)) cham soc ban hanh vi ((cua triet) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang xa hoi. ((hieu vu) OR (hieu va)) cham soc ban hanh vi ((cua triet) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang xa hoi. ((hieu vu) or (hieu va)) cham soc ban hanh vi ((cua triet) or (cuu tre))*.