Perhaps you should try some spelling variations:
tranh trong » tran trong, trinh trong, anh trong
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
trong tho » trong thoi, trong thu, trong thi
tho thong » theo thong, pho thong, tao thong
cong bang » cuong bang, dong bang, hong bang
thu canh » thuc hanh, thu cong, thu ban
ho hieu » ho chieu, hoi hieu, nho hieu
thu cau » nhu cau, thu dau, chua cau
tu cau » tu cac, cu cau, tu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - tranh trong tho thong cong bang ((((thu cau) OR (thu canh))) or (tu cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - tranh trong tho thong cong bang ((((thu cau) OR (thu canh))) OR (tu cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - tranh trong tho thong cong bang ((((thu cau) OR (thu canh))) or (tu cau))".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - tranh trong tho thong cong bang ((((thu cau) OR (thu canh))) or (tu cau))*.