Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh tai » thanh hai, thanh toan, doanh tai
cham cuu » cap cuu, chat cua
vu cham » va cham, vu kham, tu cham
cua tre » cua te, cuu tre, dua tren
cuu gia » cuu giai, cuu giao, cua gia
tu sach » thu sach, su sach, te sach
ky dang » ky nang, ky danh
ty dang » ty xang, ty hang, ty dong
hieu vu » hieu va, hieu ve, hieu su
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 ((ty dang) OR (ky dang)) ma hoi. hieu vu cham cuu gia thanh tai ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty dang) OR (ky dang)) ma hoi. hieu vu cham cuu gia thanh tai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty dang) OR (ky dang)) ma hoi. hieu vu cham cuu gia thanh tai ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty dang) OR (ky dang)) ma hoi. hieu vu cham cuu gia thanh tai ((cua tre) or (cua triet))*.