Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
quan trong » gian trong
thuong han » thuong mai, thuong va, thuong gap
hanh nang » anh nang, ganh nang, hanh mang
nang quan » ban quan, nang suat
tuong dan » huong dan, tung dan, xuong dan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thieu tinh - hanh nang quan trong ((tuong dan) or (thuong han)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu tinh - hanh nang quan trong ((tuong dan) OR (thuong han)) toan cao*.