Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hoc thien » hoc hien, hoc thieu, hoc thiet
tung dai » trung dai, tuong dai, hung dai
tung dan » dung dan, huong dan, trung dai
ban cong » bang cong, van cong, phan cong
cong tan » cong tac, cong san, cong thanh
toan cau » toan ban, toan tap, toan tai
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 thien thanh - thanh ((tung dai) OR (tung dan)) ban cong tan ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien thanh - thanh ((tung dai) OR (tung dan)) ban cong tan ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thien thanh - thanh ((tung dai) OR (tung dan)) ban cong tan ((toan cau) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: hoc thien thanh - thanh ((tung dai) OR (tung dan)) ban cong tan ((toan cau) or (toan cao))*.