Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
vanh tai » van tai, hanh tai, anh tai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo
va cam » va cham, va cac, va cao
luc va » tuc va, loc 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 ky nang xa hoi. hieu va cam ((duc va) OR (luc va)) vanh tai ((cuu tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu va cam ((duc va) OR (luc va)) vanh tai ((cuu tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. hieu va cam ((duc va) OR (luc va)) vanh tai ((cuu tre) OR (cua triet))*.