Perhaps you should try some spelling variations:
luat trong » suat trong, thuat trong, luat thuong
thien danh » thien dang, thien thanh, thien chanh
thien anh » tien anh, thien thanh, thien chanh
hanh tang » hanh trang, hanh mang, hanh tung
anh tang » anh bang, anh dang, anh nang
cong tac » cong ty
tac han » tac nhan, tac ha, tac can
han tap » han tai, toan tap, nhan tai

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 anh)) - ((hanh tang) OR (anh tang)) luat trong cong tac han tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien danh) OR (thien anh)) - ((hanh tang) OR (anh tang)) luat trong cong tac han tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien danh) or (thien anh)) - ((hanh tang) OR (anh tang)) luat trong cong tac han tap*".