Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
phong van » phung van, phong va, hong van
thong van » trong van, thong va, thong quan
hoc hieu » hoc thieu, hoc hien, doc hieu
cua nung » cua nhung, ca nung, cua nong
tan cao » toan cao, tao cao, tay cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu lang - hanh tranh cua nung ((phong van) or (thong van)) tan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - hanh tranh cua nung ((phong van) OR (thong van)) tan cao.
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - hanh tranh cua nung ((phong van) or (thong van)) tan cao*.