Perhaps you should try some spelling variations:
trang thai » trang trai, trong thai, trang tai
hieu manh » chieu xanh, hieu nganh, dieu hanh
trang thi » tran thi, trang tri, trong thi
dung cong » dung trong
hoc hieu » hoc thieu, hoc hien, doc hieu
cong dan » cong san, cong tan, huong dan
gian cau » gian chau, gian cac, gian cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - hanh ((trang thi) or (trang thai)) dung cong dan gian cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - hanh ((trang thi) OR (trang thai)) dung cong dan gian cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh ((trang thi) or (trang thai)) dung cong dan gian cau*.