Perhaps you should try some spelling variations:
thieu sach » hieu cach, theo sach, thieu cac
chieu sach » chinh sach, chiet tach, chieu sang
thien hach » thien thanh, hien hanh
hanh huong » thanh huong, anh huong, manh huong
nhung cong » dung cong, thong cong, hang cong
huong cua » dung cua
cua nhung » va nhung
cong vang » cong lang, cong quang, cong ngang
vang toan » van toan, dang toan, quang toan
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 ((((thieu sach) or (chieu sach))) or (thien hach)) - hanh huong cua nhung cong vang toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((thieu sach) OR (chieu sach))) OR (thien hach)) - hanh huong cua nhung cong vang toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((((thieu sach) or (chieu sach))) or (thien hach)) - hanh huong cua nhung cong vang toan cao*.