Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
van thanh » ban thanh, van tuan
cau tren » cu tren, dau tren, ca tren
tham luc » than luc, tham nuoc, tham thuc
cua tre » cua te, cuu tre, cua triet
luc van » luoc van, luu van, duc van
va tham » van tham, va cham, va thanh
hieu va » lieu va, hieu qua
dong ha » dong hoa, dong va, dong hoc
bai ky » ban ky, bac ky, dai ky
ha hoi » hoa hoi, ha noi, xa hoi
sai ky » sac ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((bai ky) or (sai ky)) dong ha hoi. hieu va tham luc van thanh tai ((cua tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((bai ky) OR (sai ky)) dong ha hoi. hieu va tham luc van thanh tai ((cua tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: te ((bai ky) or (sai ky)) dong ha hoi. hieu va tham luc van thanh tai ((cua tre) or (cau tren))*.