Perhaps you should try some spelling variations:
tan thanh » tran thanh, tang thanh, toan thanh
cham duc » pham duc, cham soc, pham duy
thanh va » thanh van, hanh va, thanh ha
hieu va » lieu va, hieu qua
sang ky » sang kyo, dang ky, tang ky
dang ma » dang mau, dang mam, dang mat
va cham » va chat, va tham
san ky » van ky, dan ky, ban ky
ma hoi » mai hoi, xa hoi, ma hoa
cua tu » cua tuc, cua su, cua cu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((san ky) OR (sang ky)) dang ma hoi. hieu va cham duc tan thanh va ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((san ky) OR (sang ky)) dang ma hoi. hieu va cham duc tan thanh va ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((san ky) OR (sang ky)) dang ma hoi. hieu va cham duc tan thanh va ((cua te) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: tu ((san ky) OR (sang ky)) dang ma hoi. hieu va cham duc tan thanh va ((cua te) or (cua tu))*.