Perhaps you should try some spelling variations:
thien danh » thien dang, thien thanh, thien chanh
thien anh » tien anh, thien thanh, thien chanh
thuy dung » thuy duong, thuoc dung, huy duong
huy dung » huy duong, huy dong, huu dung
cong tam » cong tac, cong tan, cong nam
tam toan » tap toan, tam than, pham toan
toan ban » van ban
quang » quan

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