Perhaps you should try some spelling variations:
thieu hach » thien hach, chieu sach, hieu cach
ngan nhung » ngan hang, nam nhung, ban nhung
gian nhung » gian vung, gioi nhung
hoc thieu » toc thieu, hoc hien
cong manh » cong danh, duong manh, cong thanh
cong san » cong tac
toan cau » 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 hach - hanh chinh ((ngan nhung) OR (gian nhung)) ((cong manh) or (cong san)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu hach - hanh chinh ((ngan nhung) OR (gian nhung)) ((cong manh) OR (cong san)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu hach - hanh chinh ((ngan nhung) OR (gian nhung)) ((cong manh) or (cong san)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu hach - hanh chinh ((ngan nhung) OR (gian nhung)) ((cong manh) or (cong san)) toan cau*.