Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
thong van » trong van, thong va, thong quan
hoc hieu » hoc thieu, hoc hien, hoc dieu
doc hieu » toc thieu, hoc thieu, hoc hien
cua nung » cua nhung, ca nung, cua nang
cua nong » cua cong, cuu nong, cua dong
van tai » von tai, van tuan
tai cao » thai cao, tao cao, tai sao

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) OR (doc hieu)) lang - hanh tranh ((cua nung) or (cua nong)) thong van tai cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (doc hieu)) lang - hanh tranh ((cua nung) OR (cua nong)) thong van tai cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hieu) OR (doc hieu)) lang - hanh tranh ((cua nung) or (cua nong)) thong van tai cao".
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) OR (doc hieu)) lang - hanh tranh ((cua nung) or (cua nong)) thong van tai cao*.