Perhaps you should try some spelling variations:
nuoc duc » ngoc duc, nuoc cuc, duoc duoc
vu sach » vu bach, su sach, vu khach
cua tre » cua te, cua triet, dua tren
tinh de » tinh da, sinh de, tinh he
va tinh » may tinh
ve nuoc » ve duoc
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
so sach » so sanh, bo sach, co sach
cuu tre » cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu sach) or (so sach)) ky nang xa hoi. hieu ve nuoc duc va tinh de ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (so sach)) ky nang xa hoi. hieu ve nuoc duc va tinh de ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (so sach)) ky nang xa hoi. hieu ve nuoc duc va tinh de ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (so sach)) ky nang xa hoi. hieu ve nuoc duc va tinh de ((cua tre) OR (cuu tre))*.