Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
va tinh » may tinh
va dinh » van dinh, va kinh, vu dinh
ve cham » va cham, ve chat, vu cham
tu sach » thu sach, te sach, tu cach
hieu ve » hieu va, hieu van
su sach » so sach, vu sach
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu
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: ((tu sach) or (su sach)) ky nang x hoi. hieu ve cham tuc ((va dinh) OR (va tinh)) vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang x hoi. hieu ve cham tuc ((va dinh) OR (va tinh)) vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ky nang x hoi. hieu ve cham tuc ((va dinh) OR (va tinh)) vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang x hoi. hieu ve cham tuc ((va dinh) OR (va tinh)) vi cuu tre*.