Perhaps you should try some spelling variations:
trang tuan » trung tuan, trong tuan, tran xuan
tran tuan » tran xuan, tran quang, tran thanh
hoc hieu » hoc thieu, hoc hien, hoc dieu
doc hieu » toc thieu, hoc thieu, hoc hien
ung cong » dung cong, luong cong, duong cong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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) or (doc hieu)) manh - hanh ((trang tuan) OR (tran tuan)) ung cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (doc hieu)) manh - hanh ((trang tuan) OR (tran tuan)) ung cong dan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hieu) or (doc hieu)) manh - hanh ((trang tuan) OR (tran tuan)) ung cong dan toan cao".
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) or (doc hieu)) manh - hanh ((trang tuan) OR (tran tuan)) ung cong dan toan cao*.