Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
hanh trinh » canh tranh, hanh chinh
quan nhung » qua nhung, cua nhung, quang hung
luan chung » luan chinh
hoc thieu » toc thieu, hoc hien
cong tac » cong ty
quan cau » quang cao, toan cau, quan ha
tuan tu » tuan thu, tran tu, toan tu

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 - hanh trinh ((quan nhung) OR (luan chung)) cong tac ((quan cau) or (tuan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sach - hanh trinh ((quan nhung) OR (luan chung)) cong tac ((quan cau) OR (tuan tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sach - hanh trinh ((quan nhung) OR (luan chung)) cong tac ((quan cau) or (tuan tu))".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sach - hanh trinh ((quan nhung) OR (luan chung)) cong tac ((quan cau) or (tuan tu))*.