Perhaps you should try some spelling variations:
trien thuat » thien thuat, trien hoat, chien thuat
tran thuat » trong thuat, tran tuan, tran thuy
bang thanh » ban thanh, dang thanh, tang thanh
phap tinh » phap sinh, phap tieng, tap tinh
phap tang » phap nang, phap tieng
hang cong » dang cong, hang nong, bang cong
cong bang » cuong bang, dong bang, hong bang
thanh cau » thanh chau, thanh mau, nhanh cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((phap tinh) or (phap tang)) - hanh ((tran thuat) OR (trien thuat)) hang cong bang thanh cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((phap tinh) OR (phap tang)) - hanh ((tran thuat) OR (trien thuat)) hang cong bang thanh cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((phap tinh) or (phap tang)) - hanh ((tran thuat) OR (trien thuat)) hang cong bang thanh cau".
• Adding a wildcard symbol may retrieve word variants: theo ((phap tinh) or (phap tang)) - hanh ((tran thuat) OR (trien thuat)) hang cong bang thanh cau*.