Perhaps you should try some spelling variations:
thieu hach » thien hach, hieu cach, thieu cac
chieu sach » chinh sach, chiet tach, chieu sang
ban nguong » tin nguong, ban huong, ban tuong
nguong dan » huong dan
hanh tang » hanh trang, anh tang, hanh mang
tang cua » mang cua, hang cua, tang luan
than cau » toan cau, than cap, thanh chau
phan cau » phan dau, phan cac, phan 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 hach) OR (chieu sach)) - hanh tang cua ban nguong dan ((than cau) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu hach) OR (chieu sach)) - hanh tang cua ban nguong dan ((than cau) OR (phan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu hach) OR (chieu sach)) - hanh tang cua ban nguong dan ((than cau) or (phan cau))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu hach) OR (chieu sach)) - hanh tang cua ban nguong dan ((than cau) or (phan cau))*.