Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
va kinh » va tinh, qua kinh
su sach » so sach, vu sach
hieu ve » hieu va, hieu van
vi cau » ve cau, di cau, viet cau
va cau » van cau, va cac, va dau
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (thuat lanh)) ky nang x hoi. hieu ve cac nuoc va kinh ((vi cau) OR (va cau)) treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thuat lanh)) ky nang x hoi. hieu ve cac nuoc va kinh ((vi cau) OR (va cau)) treo*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (thuat lanh)) ky nang x hoi. hieu ve cac nuoc va kinh ((vi cau) OR (va cau)) treo*".