Perhaps you should try some spelling variations:
nhung tuong » nhung huong, nhung phuong, hung vuong
trinh quan » trinh luat, trinh han
doi chieu » doc hieu, ho chieu, mot chieu
tuong dan » huong dan, tung dan, xuong dan
dan than » dan chan, ban than, van than
than tap » toan tap, han tap, phan tap
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (doi chi)) xanh - hanh ((trinh quan) OR (tinh quang)) nhung tuong dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (doi chi)) xanh - hanh ((trinh quan) OR (tinh quang)) nhung tuong dan than tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (doi chi)) xanh - hanh ((trinh quan) OR (tinh quang)) nhung tuong dan than tap".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (doi chi)) xanh - hanh ((trinh quan) OR (tinh quang)) nhung tuong dan than tap*.