Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thanh tai » thanh hai, thanh toan, doanh tai
hanh tai » hang tai, han tai, hinh tai
cau theo » cau tao
sach xu » sach xa, cach xu, mach xu
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
xu lang » cu lang, tu lang, xu dang
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach xu lang xa hoi. hieu ve cac duc va ((hanh tai) or (thanh tai)) ((cau theo) OR (cau thi))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach xu lang xa hoi. hieu ve cac duc va ((hanh tai) OR (thanh tai)) ((cau theo) OR (cau thi)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach xu lang xa hoi. hieu ve cac duc va ((hanh tai) or (thanh tai)) ((cau theo) OR (cau thi))".
• Adding a wildcard symbol may retrieve word variants: thuoc sach xu lang xa hoi. hieu ve cac duc va ((hanh tai) or (thanh tai)) ((cau theo) OR (cau thi))*.