Perhaps you should try some spelling variations:
thieu tach » thien hach, chieu sach, hieu cach
chiet tach » chieu sach
hanh trang » thanh trung, canh tranh, hanh trinh
nhung cong » dung cong, thong cong, nhung don
trang cua » tranh cua, tang cua, trung cua
hang cong » dang cong, hang nong, bang cong
lang toan » dang toan, lang thang, lang thanh
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) or (chiet tach)) - hanh trang cua ((nhung cong) OR (hang cong)) lang toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu tach) OR (chiet tach)) - hanh trang cua ((nhung cong) OR (hang cong)) lang toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu tach) or (chiet tach)) - hanh trang cua ((nhung cong) OR (hang cong)) lang toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu tach) or (chiet tach)) - hanh trang cua ((nhung cong) OR (hang cong)) lang toan cao*.