Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cua tre » cua te, cuu tre, dua tren
hang di » hang doi, hang vi, hang dien
tu sach » thu sach, su sach, te sach
va cham » va chat, va tham
nang ma » tang ma, sang ma, nang cao
goc va » hoc va, doc va, uoc va
y nang » ky nang, ly nang, v nang
loc va » hoc va, luc va
ma hoi » mai hoi, xa hoi, ma hoa

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 y nang ma hoi. lieu va cham ((goc va) or (loc va)) hang di ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ma hoi. lieu va cham ((goc va) OR (loc va)) hang di ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ma hoi. lieu va cham ((goc va) or (loc va)) hang di ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ma hoi. lieu va cham ((goc va) or (loc va)) hang di ((cua tre) OR (cua triet))*.