Perhaps you should try some spelling variations:
thanh tung » thanh cong
quang hanh » quang thanh, quang khanh, quan hanh
hoc thieu » toc thieu, hoc hien
quanh han » quang chan, quang hoan, quang phan
hoc hieu » hoc hien, doc hieu, hoc dieu
tong dan » tuong dan, thong dan, trong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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) or (hoc thieu)) cach - thanh tung ((quanh han) OR (quang hanh)) tong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (hoc thieu)) cach - thanh tung ((quanh han) OR (quang hanh)) tong dan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hieu) or (hoc thieu)) cach - thanh tung ((quanh han) OR (quang hanh)) tong dan than cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) or (hoc thieu)) cach - thanh tung ((quanh han) OR (quang hanh)) tong dan than cau*.