Perhaps you should try some spelling variations:
bang suong » bang song, bang tuong, nang song
hieu lang » chieu sang, hieu quang, nhieu tang
manh toan » thanh toan, anh tuan, tinh toan
thanh va » thanh van, hanh va, thanh ha
trinh va » trinh van, trinh vat, trinh ve
toan cau » toan cao, toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - hanh ((thanh va) or (trinh va)) ((bang suong) or (bang phuong)) manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh ((thanh va) OR (trinh va)) ((bang suong) OR (bang phuong)) manh toan cau.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh ((thanh va) or (trinh va)) ((bang suong) or (bang phuong)) manh toan cau*.