Perhaps you should try some spelling variations:
hieu thien » hieu hien, chieu chien, dieu khien
thien loc » chien luoc, thien moi
loc nuoc » hoc nuoc, loc ngoc, loc quoc
danh vi » dinh vi, danh di, danh va
so sach » bo sach, co sach, hoc sach
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
so sanh » do sanh
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: ((so sach) or (so sanh)) ky tang xa hoi. hieu thien loc nuoc va ((danh vi) OR (hanh vi)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) ky tang xa hoi. hieu thien loc nuoc va ((danh vi) OR (hanh vi)) cua tu*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (so sanh)) ky tang xa hoi. hieu thien loc nuoc va ((danh vi) OR (hanh vi)) cua tu*".