Perhaps you should try some spelling variations:
giang van » dang van, gian dan, giang day
hoang van » hang va
ban hanh » ban hang
bo sach » co sach, hoc sach
sach tu » sach thu, cach tu, sach ty
qua cam » qua cham, qua cac, qua ca
vai cua » dai cua, hai cua, lai cua
va dan » ca dan, va dao, va dau
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: bo sach tu ((giang van) or (hoang van)) hoi. hieu qua cam xuc ((va dan) or (ban hanh)) vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach tu ((giang van) OR (hoang van)) hoi. hieu qua cam xuc ((va dan) OR (ban hanh)) vai cua te.
• Adding a wildcard symbol may retrieve word variants: bo sach tu ((giang van) or (hoang van)) hoi. hieu qua cam xuc ((va dan) or (ban hanh)) vai cua te*.