Perhaps you should try some spelling variations:
thieu tach » thien hach, chiet tach, chieu sach
hoc thieu » toc thieu, hoc hien
trang cua » tranh cua, tang cua, trung cua
tran tuan » tran xuan, tran quang, tran thanh
cong dan » cong tan, huong dan, cong dong
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 tach - hanh ((trang cua) or (tran tuan)) hang ((cong dan) OR (cong san)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tach - hanh ((trang cua) OR (tran tuan)) hang ((cong dan) OR (cong san)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu tach - hanh ((trang cua) or (tran tuan)) hang ((cong dan) OR (cong san)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc thieu tach - hanh ((trang cua) or (tran tuan)) hang ((cong dan) OR (cong san)) toan cau*.