Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
hanh doi » thanh doi, hanh noi, hang doi
tu sach » su sach, te sach, tu cach
doi cua » dai cua, hoi cua
hieu ve » hieu va, hieu van
tuc va » thuc va, truc va, tuc xa
ve cua » le cua, de cua, te cua
xac va » tac va, ac va, bac va
ang xa » lang xa, mang xa, dang xay
ly ang » ly hang, ly vang, ly nang
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: ((tu sach) OR (thu sach)) ly ang xa hoi. hieu ve cua ((xac va) or (tuc va)) hanh doi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ly ang xa hoi. hieu ve cua ((xac va) OR (tuc va)) hanh doi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ly ang xa hoi. hieu ve cua ((xac va) or (tuc va)) hanh doi cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ly ang xa hoi. hieu ve cua ((xac va) or (tuc va)) hanh doi cua te*.