Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
luan nhung » luan chung, luan hung, quan nhung
nhung cong » dung cong, thong cong, hang cong
cong thanh » dong thanh, cong trinh, cong tan
thanh quan » thanh xuan, thanh tuan, nhanh quang
hoc thiet » hoc thieu, hoc thuyet, hoc hien
hanh dung » thanh dung, hanh dong, manh dung
anh dung » anh dong, anh huong, sach dung
quan ban » quang ban, qua ban, quan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thiet tach - ((hanh dung) OR (anh dung)) luan nhung cong thanh quan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet tach - ((hanh dung) OR (anh dung)) luan nhung cong thanh quan ban".
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - ((hanh dung) OR (anh dung)) luan nhung cong thanh quan ban*.