Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
dong cua » dung cua, cong cua, huong cua
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cau loc » hau loc, cau hoc, cau luc
loc ban » lo ban, hoc ban, coc ban
doi cua » dai cua, hoi cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky nang xa hoi. ((hieu ve) or (lieu va)) cau loc ban thanh ((doi cua) OR (dong cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. ((hieu ve) OR (lieu va)) cau loc ban thanh ((doi cua) OR (dong cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. ((hieu ve) or (lieu va)) cau loc ban thanh ((doi cua) OR (dong cua)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. ((hieu ve) or (lieu va)) cau loc ban thanh ((doi cua) OR (dong cua)) tre*.