Perhaps you should try some spelling variations:
hieu hien » bieu hien, dieu hien, chieu chien
hien bach » vien bach, thien hach, hien hanh
dien cua » dien cuc, dien cu, tien cua
dieu cua » dieu tra
nang xa » nang x, lang xa, nang ma
tuoc va » thuoc va, nuoc va, tuc va
duoc va » nuoc va, duc va, duoc ma
vu sac » vu sach, vu san, va sac
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sac ky nang xa hoi. hieu hien bach ((tuoc va) or (duoc va)) danh ((dien cua) OR (dieu cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky nang xa hoi. hieu hien bach ((tuoc va) OR (duoc va)) danh ((dien cua) OR (dieu cua)) te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sac ky nang xa hoi. hieu hien bach ((tuoc va) or (duoc va)) danh ((dien cua) OR (dieu cua)) te*".