Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu
lanh manh » lanh tranh, lan anh, van manh
cua nhung » va nhung
manh cua » doanh cua, ban cua
cong tac » cong ty
tac vang » cac van, tac dung, tac dong
vang ban » van ban, hang ban, nang ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thieu) or (hoc hien)) sach - lanh manh cua nhung cong tac vang ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (hoc hien)) sach - lanh manh cua nhung cong tac vang ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (hoc hien)) sach - lanh manh cua nhung cong tac vang ban*.