Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
hieu cao » chieu cao, hieu cac, hieu ca
sang ma » tang ma, nang ma, sang tao
nang xa » nang x, lang xa, nang ma
sach ly » sach y, sach lo, sach ty
chat su » achat su, chat huu, chat cua
hanh de » hanh ve, hanh kem
cuu tre » cua tre, cau tren, cau treo
vu sach » vu bach, su sach, vu khach
su van » tu van, vu van

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ly ((nang xa) or (sang ma)) hoi. hieu cao chat su van hanh de ((cuu tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ly ((nang xa) OR (sang ma)) hoi. hieu cao chat su van hanh de ((cuu tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: vu sach ly ((nang xa) or (sang ma)) hoi. hieu cao chat su van hanh de ((cuu tre) or (cua triet))*.