Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
van pham » san pham, van phan, van phat
va hanh » van hanh, va thanh, va danh
thu tai » tu tai, tru tai, thu hai
lang ha » long ha
lang xa » dang xay, lang van
tai ky » thai ky, trai 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: thu tai ky ((lang xa) OR (lang ha)) hoi. hieu van pham duc va hanh vai ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu tai ky ((lang xa) OR (lang ha)) hoi. hieu van pham duc va hanh vai ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu tai ky ((lang xa) OR (lang ha)) hoi. hieu van pham duc va hanh vai ((cua te) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: thu tai ky ((lang xa) OR (lang ha)) hoi. hieu van pham duc va hanh vai ((cua te) or (cua tu))*.