Perhaps you should try some spelling variations:
dong thanh » truong thanh
thanh sang » thanh san, thanh hang, thanh hoang
lang dong » lang trong, lao dong, cong dong
ho chieu » theo chieu, hoc thieu, doi chieu
tranh va » tranh van, trang va, trinh va
tran van » luan van
sang bae » sang tao, hang ban, sang ma
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (doi chi)) xanh - canh ((tranh va) or (tran van)) lang dong thanh sang bae~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chi)) xanh - canh ((tranh va) OR (tran van)) lang dong thanh sang bae.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (doi chi)) xanh - canh ((tranh va) or (tran van)) lang dong thanh sang bae*.