Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
cua viet » ca viet, hoa viet, cua vat
hanh tai » hang tai, han tai, hinh tai
su sach » vu sach
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
so sach » so sanh, bo sach, co sach
cac thu » cach thuc, cac thoi
ve cac » va cac, vien cac
thu va » thuc va, thue va, tu va
y lang » o lang, _ lang, tay lang

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 (so sach)) y lang xa hoi. hieu ve cac thu va ((hanh tai) OR (thanh tai)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) y lang xa hoi. hieu ve cac thu va ((hanh tai) OR (thanh tai)) cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) y lang xa hoi. hieu ve cac thu va ((hanh tai) OR (thanh tai)) cua viet*".