Perhaps you should try some spelling variations:
tan hang » tan khang, ban hang, van hang
hang hai » hoang hai, hang tai, thanh hai
pham duy » pham duc
nang xa » nang x, lang xa, nang ma
hieu vu » hieu va, hieu ve, dieu vu
cua tre » cuu tre, cua triet, dua tren
hieu su » hieu sau, tieu su, hieu so
duy tan » duy tuan, duc tan, duy van
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky nang xa hoi. ((hieu vu) OR (hieu su)) pham duy tan hang hai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky nang xa hoi. ((hieu vu) OR (hieu su)) pham duy tan hang hai ((cua tre) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang xa hoi. ((hieu vu) OR (hieu su)) pham duy tan hang hai ((cua tre) or (cua te))*".