Perhaps you should try some spelling variations:
nhiet tach » chiet tach
thanh tung » thanh cong
hoc nhiet » hoc thiet, hoc nghien, hoc hien
trong sat » trong san, trong dat, trong sam
phan dau » phan tu
hang dau » hang va, hang tai
tung ha » trung ha, dung ha, tung ho
ha dung » hai dung, kha dung, nha dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc nhiet tach - thanh tung ha dung trong sat ((phan dau) or (hang dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc nhiet tach - thanh tung ha dung trong sat ((phan dau) OR (hang dau)).
• Adding a wildcard symbol may retrieve word variants: hoc nhiet tach - thanh tung ha dung trong sat ((phan dau) or (hang dau))*.