Perhaps you should try some spelling variations:
trong hung » trong nhung, trong phung, trong rung
hieu lang » chieu sang, hieu quang, nhieu tang
trinh vat » trinh van, trinh luat, trinh han
hung manh » nhung manh, hung anh, tung manh
moi hieu » moi dieu, hoi hieu, doi chieu
toan cao » toan tap
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: moi hieu lang - hanh ((trinh vat) OR (sinh vat)) trong hung manh ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: moi hieu lang - hanh ((trinh vat) OR (sinh vat)) trong hung manh ((toan cao) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "moi hieu lang - hanh ((trinh vat) OR (sinh vat)) trong hung manh ((toan cao) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: moi hieu lang - hanh ((trinh vat) OR (sinh vat)) trong hung manh ((toan cao) or (toan ban))*.