Perhaps you should try some spelling variations:
thanh nhan » thanh phan, thanh san, thanh toan
hang huong » hang thuong, hang luong, hoang phuong
dan thanh » dang thanh, danh thanh, ban thanh
doc hieu » toc thieu, hoc thieu, hoc hien
hieu luc » hieu luat, hieu qua
tinh cua » trinh cua, tinh chat, tranh cua
sinh cua » manh cua, dinh cuu, sinh va

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu luc - hanh ((tinh cua) OR (sinh cua)) hang huong dan thanh nhan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu luc - hanh ((tinh cua) OR (sinh cua)) hang huong dan thanh nhan".
• Adding a wildcard symbol may retrieve word variants: doc hieu luc - hanh ((tinh cua) OR (sinh cua)) hang huong dan thanh nhan*.