Perhaps you should try some spelling variations:
thien danh » thien anh, thien thanh, thien chanh
thien dang » thien bang, thien nang, thien cong
thanh tung » thanh cong
tung tuan » trung tuan, hung tuan, quang tuan
tuan dung » tuan duong, tran dung, tan dung
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
toan ban » van ban

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 danh) OR (thien dang)) - thanh tung tuan dung cong tan ((toan ban) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien danh) OR (thien dang)) - thanh tung tuan dung cong tan ((toan ban) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien danh) OR (thien dang)) - thanh tung tuan dung cong tan ((toan ban) or (toan tap))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien danh) OR (thien dang)) - thanh tung tuan dung cong tan ((toan ban) or (toan tap))*.