Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung phap » trung phan, trong phap, trung phat
cong thanh » dong thanh, cong trinh, truong thanh
hoc chieu » ho chieu, hoc hien, hoc dieu
hoc thieu » toc thieu, hoc hien
phap dung » pham dung, phan dung, phap cung
cong tan » cong tac, cong san, cong ty
hoa cao » hoc cao, hoa co, hoa cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc chieu) or (hoc thieu)) sach - thanh trung phap dung ((cong thanh) OR (cong tan)) hoa cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (hoc thieu)) sach - thanh trung phap dung ((cong thanh) OR (cong tan)) hoa cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chieu) or (hoc thieu)) sach - thanh trung phap dung ((cong thanh) OR (cong tan)) hoa cao".
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) or (hoc thieu)) sach - thanh trung phap dung ((cong thanh) OR (cong tan)) hoa cao*.