Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, phan duc
pham duy » pham duc
tan hanh » tan thanh, tang hanh, toan hanh
tu sang » thu sang, tu san, tu lang
hanh va » hang va, hanh vi
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
cua tre » cuu tre, cua triet, dua tren
hieu ve » hieu va, hieu van
sang ky » sang kyo, dang ky, tang ky
cua te » cua tu
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 sang ky tang ma hoi. hieu ve ((cham duc) or (pham duy)) tan hanh va ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sang ky tang ma hoi. hieu ve ((cham duc) OR (pham duy)) tan hanh va ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: tu sang ky tang ma hoi. hieu ve ((cham duc) or (pham duy)) tan hanh va ((cua tre) or (cua te))*.