Perhaps you should try some spelling variations:
dao thanh » ban thanh, tro thanh, de thanh
da thanh » dat thanh, dam thanh, dan thanh
cam thuc » am thuc, nam thuc, cam thu
cua tre » cua te, cua triet, dua tren
vu sach » vu bach, su sach, vu khach
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
cuu tre » cau tren, cau treo
ve cam » ve cham, ve cac, va cam
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: vu sach ty nang x hoi. hieu ve cam thuc ((da thanh) or (dao thanh)) nghia ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty nang x hoi. hieu ve cam thuc ((da thanh) OR (dao thanh)) nghia ((cua tre) OR (cuu tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ty nang x hoi. hieu ve cam thuc ((da thanh) or (dao thanh)) nghia ((cua tre) OR (cuu tre))*".