Perhaps you should try some spelling variations:
dong hoa » dong hoc, dong co
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
sach sy » sach y, sach ty, sach hay
hanh va » hang va, hanh vi
van lam » van nam
hoa hoi » khoa hoi, hoa hoc, hoa doi
sy dong » ly dong, so dong, su dong
cuu tre » cua tre, cau tren, cau treo
xac va » tac va, ac va, bac va
luc va » duc va, tuc va, loc va
va cuu » va cau, va chu, va huu

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 sy dong hoa hoi. hieu van lam ((xac va) or (luc va)) hanh va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach sy dong hoa hoi. hieu van lam ((xac va) OR (luc va)) hanh va cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach sy dong hoa hoi. hieu van lam ((xac va) or (luc va)) hanh va cuu tre*.