Perhaps you should try some spelling variations:
dac trung » duc trung, cac truong, tai trung
trung van » truong van, trong van, trung va
hieu van » hieu va, thien van, lieu va
sach kem » hanh kem
hanh dai » hanh tai, hanh dao, vanh dai
van hanh » van thanh, ban hanh, van anh
cua tre » cuu tre, cua triet, dua tren
van dac » van dao, van dau, van hac
lang xa » lang ha, dang xay, lang van
sac ky » cac ky, sai ky
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 kem) or (sac ky)) lang xa hoi. hieu van dac trung van hanh dai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach kem) OR (sac ky)) lang xa hoi. hieu van dac trung van hanh dai ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: tu ((sach kem) or (sac ky)) lang xa hoi. hieu van dac trung van hanh dai ((cua tre) or (cua te))*.