Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hien nhanh » hien hanh, tien thanh, dien thanh
trong cua » truong cua, trong ca, trong qua
thong cua » thong quan, thong tu, huong cua
dung cong » dung trong
cong vang » cong lang, cong quang, cong ngang
vang tan » van tan, tang tan, vang tao
tan cau » toan cau, van cau, tan ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien nhanh) or (thien thanh)) - hanh ((trong cua) OR (thong cua)) dung cong vang tan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien nhanh) OR (thien thanh)) - hanh ((trong cua) OR (thong cua)) dung cong vang tan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien nhanh) or (thien thanh)) - hanh ((trong cua) OR (thong cua)) dung cong vang tan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) or (thien thanh)) - hanh ((trong cua) OR (thong cua)) dung cong vang tan cau*.