Perhaps you should try some spelling variations:
tan thanh » tran thanh, tang thanh, toan thanh
kho tang » cao tang
tang mai » tang ma, tang tai, lang mai
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
pham duy » pham duc
thanh vi » hanh vi, thanh va, thanh ve
san kho » san khoa, san cho, lan kho
mai hoi » mai khoi, dai hoi, lai hoi
duy tan » duy tuan, duc tan, duy van
cua tre » cua te, cuu tre, cua triet
tu san » thu san, tu ban, tu can
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san kho tang mai hoi. hieu van pham duy tan thanh vi ((cua tre) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san kho tang mai hoi. hieu van pham duy tan thanh vi ((cua tre) OR (cua tu)).
• Adding a wildcard symbol may retrieve word variants: tu san kho tang mai hoi. hieu van pham duy tan thanh vi ((cua tre) or (cua tu))*.