Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
thuoc dieu » thuc dieu, hoc dieu, thuat dieu
phuong dan » phuong danh, phuong doan, huong dan
trinh vat » trinh luat, sinh vat, trinh han
trinh van » trinh han, trinh quan, trinh toan
than cao » thai cao, than cap, than sao
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc dieu hanh - hanh ((trinh vat) OR (trinh van)) nhung phuong dan ((than cao) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc dieu hanh - hanh ((trinh vat) OR (trinh van)) nhung phuong dan ((than cao) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc dieu hanh - hanh ((trinh vat) OR (trinh van)) nhung phuong dan ((than cao) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: thuoc dieu hanh - hanh ((trinh vat) OR (trinh van)) nhung phuong dan ((than cao) or (toan cao))*.