Perhaps you should try some spelling variations:
tran hoang » tran hong, quan hoang, tran quang
thieu xanh » chieu xanh, hieu manh, thien danh
thien anh » thien danh, tien anh, thien thanh
hoang van » hang va
lang cong » dang cong, bang cong, hang cong
van lang » van nang, va lang, van hang
cong tac » cong ty
than cau » toan cau, phan cau, thanh chau
than cap » khan cap, thanh lap, thanh cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) OR (thien anh)) - tran hoang van lang cong tac ((than cau) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien anh)) - tran hoang van lang cong tac ((than cau) OR (than cap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (thien anh)) - tran hoang van lang cong tac ((than cau) or (than cap))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (thien anh)) - tran hoang van lang cong tac ((than cau) or (than cap))*.