Perhaps you should try some spelling variations:
phuong thanh » phong thanh, truong thanh, muong thanh
phuong thao » phuong phap, phuong thuc
chieu sang » chieu sach, chieu xanh, hieu lang
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
ho chieu » theo chieu, hoc thieu, doi chieu
toan ban » van ban
va lang » va nang, hoa lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sang - ((hanh tang) OR (hanh mang)) va lang ((phuong thanh) or (phuong thao)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - ((hanh tang) OR (hanh mang)) va lang ((phuong thanh) OR (phuong thao)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - ((hanh tang) OR (hanh mang)) va lang ((phuong thanh) or (phuong thao)) toan ban".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - ((hanh tang) OR (hanh mang)) va lang ((phuong thanh) or (phuong thao)) toan ban*.