Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
nhung cong » thong cong, hang cong, nhung don
hoc thien » hoc hien, hoc thieu, hoc thiet
dung cong » dung trong
tinh cua » trinh cua, sinh cua, tinh chat
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thien hach - nhanh tinh cua ((nhung cong) OR (dung cong)) ((dan than) or (dan chan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - nhanh tinh cua ((nhung cong) OR (dung cong)) ((dan than) OR (dan chan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thien hach - nhanh tinh cua ((nhung cong) OR (dung cong)) ((dan than) or (dan chan)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - nhanh tinh cua ((nhung cong) OR (dung cong)) ((dan than) or (dan chan)) cao*.