Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh van » thanh san, thanh toan, thanh phan
cau thuc » cau truc, cuu thuc, can thuc
thanh va » hanh va, thanh ha, thanh ve
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, dua tren
su sach » so sach, vu sach
va cau » van cau, va cac, va dau
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang x hoi. hieu va cau thuc va ((thanh va) OR (thanh van)) ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. hieu va cau thuc va ((thanh va) OR (thanh van)) ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang x hoi. hieu va cau thuc va ((thanh va) OR (thanh van)) ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. hieu va cau thuc va ((thanh va) OR (thanh van)) ((cua tre) or (cua triet))*.