Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
van hanh » van thanh, ban hanh, van anh
nam mua » nam cua, nam qua, nam luat
hanh ve » hanh vi, hanh va, hanh kem
nam xua » nam cua, nam qua, nam luat
hieu ve » hieu va, hieu van
dang xa » dang xay, lang xa, dang ha
ky dang » ky nang, ky danh
sac ky » cac ky, sai ky
te sac » te sach, te cac, te san
ve va » ve van, te va, ke va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky dang xa hoi. ((hieu ve) or (lieu va)) ((nam xua) OR (nam mua)) van hanh ve va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky dang xa hoi. ((hieu ve) OR (lieu va)) ((nam xua) OR (nam mua)) van hanh ve va trien*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky dang xa hoi. ((hieu ve) or (lieu va)) ((nam xua) OR (nam mua)) van hanh ve va trien*".