Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh tang » hanh trang, hanh mang, hanh tung
cua thong » cua thuong, cua khong, cua tong
thong dan » thong van, tuong dan, thong den
anh tang » anh bang, anh dang, anh nang
dan phan » doan phan, dan chan, van phan
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 ((hieu manh) or (thien thanh)) - ((hanh tang) OR (anh tang)) cua thong thong dan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (thien thanh)) - ((hanh tang) OR (anh tang)) cua thong thong dan phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (thien thanh)) - ((hanh tang) OR (anh tang)) cua thong thong dan phan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (thien thanh)) - ((hanh tang) OR (anh tang)) cua thong thong dan phan cau*.