Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
toc thien » toc thieu, ton thien, duoc thien
hanh nang » anh nang, ganh nang, hanh mang
dung cong » dung trong
cong tap » cuong tap, cong tac, cong tan
toan cao » toan ban
toan tap » toan ban
nang su » dang su, nang du, nang tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc thien hach - hanh nang su dung cong tap ((toan cao) OR (toan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc thien hach - hanh nang su dung cong tap ((toan cao) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: toc thien hach - hanh nang su dung cong tap ((toan cao) OR (toan tap))*.