Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hieu nganh » vien nganh, hiem ngan, hieu manh
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
tong tuong » trong tuong, tuong tuong, tong thuong
tinh cua » trinh cua, sinh cua, tinh chat
cua tong » cua cong, cua dong, cua nong
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu nganh) or (thien thanh)) - nhanh tinh cua tong tuong ((dan than) OR (dan chan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu nganh) OR (thien thanh)) - nhanh tinh cua tong tuong ((dan than) OR (dan chan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu nganh) or (thien thanh)) - nhanh tinh cua tong tuong ((dan than) OR (dan chan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu nganh) or (thien thanh)) - nhanh tinh cua tong tuong ((dan than) OR (dan chan)) cau*.