Perhaps you should try some spelling variations:
thanh trung » thanh tung
duong trong » dung trong
thieu xanh » chieu xanh, hieu manh, thien anh
chieu tinh » trieu tinh, lieu tinh, chau tinh
trong tac » trong cac, tuong tac, trong tan
tren thuc » trien thuc, tron thuc, trinh thuc
trung va » truong va, trang va, trung ha
va duong » van duong, va tuong, va huong
tac tren » rac tren, tai tren, tap tren

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) or (chieu tinh)) - thanh trung va duong trong tac tren thuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu tinh)) - thanh trung va duong trong tac tren thuc.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (chieu tinh)) - thanh trung va duong trong tac tren thuc*.