Perhaps you should try some spelling variations:
nhung long » nhung cong, nhung lang, hung long
hieu luch » hieu luat, hieu tuc, tieu luc
hieu cach » hieu cac, chieu sach, hieu ca
lanh manh » lanh tranh, lan anh, van manh
cua nhung » va nhung
long tinh » cong tinh, trong tinh, luong tin
hieu luc » hieu luat, hieu qua
manh cua » doanh cua, ban cua
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: hoc ((((hieu luch) OR (hieu cach))) or (hieu luc)) - lanh manh cua nhung long tinh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((hieu luch) OR (hieu cach))) OR (hieu luc)) - lanh manh cua nhung long tinh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((((hieu luch) OR (hieu cach))) or (hieu luc)) - lanh manh cua nhung long tinh toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((((hieu luch) OR (hieu cach))) or (hieu luc)) - lanh manh cua nhung long tinh toan cao*.