Perhaps you should try some spelling variations:
trinh tiong » trinh tieng, trinh trong, trinh tong
tiong chang » thon chang, trong chan, trong chong
chang duong » chuong duong, giang duong, chan dung
hanh trinh » canh tranh, hanh chinh
duong manh » duong van
hieu lang » chieu sang, hieu quang, nhieu tang
toan cao » toan tap
toan ban » van ban
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 trinh tiong chang duong manh ((toan cao) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - hanh trinh tiong chang duong manh ((toan cao) OR (toan ban))".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh trinh tiong chang duong manh ((toan cao) OR (toan ban))*.