Perhaps you should try some spelling variations:
hieu thien » hieu hien, chieu chien, dieu khien
thien hach » thien thanh, hien hanh
hach nuoc » sach nuoc, hoc nuoc, cac nuoc
co sach » bo sach, cuon sach, hoc sach
hoc cac » hoc cao
nang xa » nang x, lang xa, nang ma
danh vi » dinh vi, danh di, danh va
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((co sach) or (hoc cac)) ky nang xa hoi. hieu thien hach nuoc va ((danh vi) OR (hanh vi)) cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((co sach) OR (hoc cac)) ky nang xa hoi. hieu thien hach nuoc va ((danh vi) OR (hanh vi)) cua su*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((co sach) or (hoc cac)) ky nang xa hoi. hieu thien hach nuoc va ((danh vi) OR (hanh vi)) cua su*".