Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
su sach » so sach, vu sach
ky lang » ky dang, ky tang, tay lang
hieu va » hieu qua
hac duc » hoc duc, ha duc, thach duc
duc gia » quoc gia
vai cua » dai cua, hai cua, lai cua
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 sach ((ky lang) OR (ky nang)) xa hoi. ((hieu va) or (lieu va)) hac duc gia thanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky lang) OR (ky nang)) xa hoi. ((hieu va) OR (lieu va)) hac duc gia thanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky lang) OR (ky nang)) xa hoi. ((hieu va) or (lieu va)) hac duc gia thanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky lang) OR (ky nang)) xa hoi. ((hieu va) or (lieu va)) hac duc gia thanh vai cua te*.