Perhaps you should try some spelling variations:
dao dang » cao dang, da dang, dao dong
dang xay » dang van, van xay
van manh » van minh, van anh, van hanh
sach dao » lanh dao
tu sach » thu sach, su sach, te sach
hai cho » han cho, hoi cho, lai cho
va manh » va danh, va hanh, ha manh
cho tre » cho thue, khoe tre
va cham » va chat, va tham
xay hoi » xa hoi, tay hoi, cay phoi
ve cai » va cai, ve cac, ve tai

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 dao dang xay hoi. hieu ((ve cai) or (va cham)) xuc ((va manh) OR (van manh)) hai cho tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach dao dang xay hoi. hieu ((ve cai) OR (va cham)) xuc ((va manh) OR (van manh)) hai cho tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach dao dang xay hoi. hieu ((ve cai) or (va cham)) xuc ((va manh) OR (van manh)) hai cho tre*".