Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thien va » thien van, tien va, thien tai
phan tap » phan lap, han tap, pha tap
cua tre » cua te, cuu tre, dua tren
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
va cham » va chat, va tham
cao hoi » cau hoi, co hoi, cao hoc
tuc va » thuc va, truc va, tuc xa
xuc va » duc va, luc va, xac 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 cao hoi. thien va cham ((xuc va) or (tuc va)) phan tap ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang cao hoi. thien va cham ((xuc va) OR (tuc va)) phan tap ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang cao hoi. thien va cham ((xuc va) or (tuc va)) phan tap ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang cao hoi. thien va cham ((xuc va) or (tuc va)) phan tap ((cua tre) OR (cua triet))*.