Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
nang lai » nang tai, mang lai, nang cai
hanh vai » hanh vi, hanh tai, hanh van
sang tai » hang tai, sang tao, tang tai
hanh va » hang va, hanh vi
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
va coc » va cuoc, va cac, va hoc
luc va » duc va, tuc va, loc va
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: hoc sach ty ((nang lai) or (sang tai)) hoa. hieu va coc luc va ((hanh vai) or (hanh va)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ty ((nang lai) OR (sang tai)) hoa. hieu va coc luc va ((hanh vai) OR (hanh va)) cua te.
• Adding a wildcard symbol may retrieve word variants: hoc sach ty ((nang lai) or (sang tai)) hoa. hieu va coc luc va ((hanh vai) or (hanh va)) cua te*.