Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thanh trung » thanh tung
hien nhanh » hien hanh, tien thanh, dien thanh
trung phan » trung thanh, trung ha, dung phan
trong gian » trong giang, trong giao, trong gia
gian chung » gian nhung, giay chung, gian hung
ung trong » dung trong, cung trong, vung trong
phan ung » phan xuong, phan cong

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien nhanh) OR (thien thanh)) - thanh trung phan ung trong gian chung cu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien nhanh) OR (thien thanh)) - thanh trung phan ung trong gian chung cu".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien nhanh) OR (thien thanh)) - thanh trung phan ung trong gian chung cu*.