Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh hai » thanh hai, nhanh hai, hang hai
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
dua ban » dia ban, cua ban, qua ban
cua tre » cua te, cuu tre, dua tren
van cau » van dau, van hau, van chat
cau dua » cau qua, cau cua, ca dua
nang xa » nang x, lang xa, nang ma
su xac » pu xac, su cac
su sac » su sach, su cac

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) OR (su xac)) ky nang xa hoi. hieu van cau dua ban hanh hai ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su xac)) ky nang xa hoi. hieu van cau dua ban hanh hai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) OR (su xac)) ky nang xa hoi. hieu van cau dua ban hanh hai ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: ((su sac) OR (su xac)) ky nang xa hoi. hieu van cau dua ban hanh hai ((cua tre) or (cua triet))*.