Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thanh va » thanh van, hanh va, thanh ha
dang xay » dang van, van xay
lam duc » lam duoc, pham duc, nam duoc
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
lang xa » lang ha, lang van
va lam » van lam, va lap
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: thuoc sach ty ((lang xa) OR (dang xay)) hoi. hieu va lam duc va ((hanh vi) or (thanh va)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ty ((lang xa) OR (dang xay)) hoi. hieu va lam duc va ((hanh vi) OR (thanh va)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ty ((lang xa) OR (dang xay)) hoi. hieu va lam duc va ((hanh vi) or (thanh va)) cua te".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ty ((lang xa) OR (dang xay)) hoi. hieu va lam duc va ((hanh vi) or (thanh va)) cua te*.