Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
nhung cong » dung cong, thong cong, hang cong
hoc thien » hoc hien, hoc thieu, hoc thiet
tranh va » tranh van, trinh va, thanh va
trang va » tran van, hang va
cong ban » cong bang, cong san, cong tan
ban than » ban thanh, van thanh, ban hang
than cau » toan cau, phan cau, than cap

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 - hanh ((tranh va) OR (trang va)) nhung cong ban than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thien hach - hanh ((tranh va) OR (trang va)) nhung cong ban than cau".
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - hanh ((tranh va) OR (trang va)) nhung cong ban than cau*.