Perhaps you should try some spelling variations:
nhung huong » nhung phuong, nhung tuong, nhung cong
theo chieu » theo tieu, theo chu, thi chieu
trinh vat » trinh van, trinh luat, sinh vat
ho chieu » hoc thieu, doi chieu, mot chieu
trinh ve » trinh he, trinh va, trinh vi
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, 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: ((theo chieu) OR (ho chieu)) xanh - hanh ((trinh vat) or (trinh ve)) nhung huong dan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (ho chieu)) xanh - hanh ((trinh vat) OR (trinh ve)) nhung huong dan than cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (ho chieu)) xanh - hanh ((trinh vat) or (trinh ve)) nhung huong dan than cao".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (ho chieu)) xanh - hanh ((trinh vat) or (trinh ve)) nhung huong dan than cao*.