Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cham duc » pham duc, cham soc, phan duc
pham duy » pham duc
ban hanh » ban hang
hanh vai » hanh vi, hanh va, hanh tai
ky dang » ky nang, ky danh
dang ha » dong ha, dung ha, lang ha
vai cua » dai cua, hai cua, lai cua
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
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: su sac ky dang ha noi. hieu van ((cham duc) or (pham duy)) ban hanh vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky dang ha noi. hieu van ((cham duc) OR (pham duy)) ban hanh vai cua tu.
• Adding a wildcard symbol may retrieve word variants: su sac ky dang ha noi. hieu van ((cham duc) or (pham duy)) ban hanh vai cua tu*.