Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu viec » nhieu viec, hieu ve, sieu viet
viec cam » viec lam, viec cua, viec va
tinh hoc » sinh hoc, tin hoc, hinh hoc
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
va tinh » may tinh
cua tre » cua te, dua tren, cua thep
cuu tre » cau tren, cau treo
xuc va » duc va, tuc va, luc 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 lang xa hoi. hieu viec cam xuc va tinh hoc ((((cua tre) OR (cuu tre))) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang xa hoi. hieu viec cam xuc va tinh hoc ((((cua tre) OR (cuu tre))) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky lang xa hoi. hieu viec cam xuc va tinh hoc ((((cua tre) OR (cuu tre))) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang xa hoi. hieu viec cam xuc va tinh hoc ((((cua tre) OR (cuu tre))) or (cua triet))*.