Perhaps you should try some spelling variations:
nhanh dung » nhanh dong, hanh dung, nhanh hung
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
dung thai » duong thai, dung tai, dung hai
manh toan » thanh toan, anh tuan, tinh toan
cau sach » cao sach, hau sach, khau sach
rau sach » hau sach, khau sach, nam sach
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((cau sach) or (rau sach)) - nhanh dung thai ((nhung cong) OR (thong cong)) manh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((cau sach) OR (rau sach)) - nhanh dung thai ((nhung cong) OR (thong cong)) manh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((cau sach) or (rau sach)) - nhanh dung thai ((nhung cong) OR (thong cong)) manh toan cao".
• Adding a wildcard symbol may retrieve word variants: theo ((cau sach) or (rau sach)) - nhanh dung thai ((nhung cong) OR (thong cong)) manh toan cao*.