Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
nganh hong » nganh khong, nganh cong, nganh nong
tranh cong » thanh cong, trinh cong, tran cong
hong thai » cong thai, hong ha, hinh thai
thu sach » tu sach, thuoc sach, thu hoach
thu canh » thuc hanh, thu cong, thu ban
cong khi » cong thai, khong khi, co khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( ((thu sach) OR (thuat sach)) nganh hong thai đong luc ) or ( thu canh tranh cong khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((thu sach) OR (thuat sach)) nganh hong thai đong luc ) OR ( thu canh tranh cong khi đong luc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((thu sach) OR (thuat sach)) nganh hong thai đong luc ) or ( thu canh tranh cong khi đong luc ))".
• Adding a wildcard symbol may retrieve word variants: (( ((thu sach) OR (thuat sach)) nganh hong thai đong luc ) or ( thu canh tranh cong khi đong luc ))*.