Perhaps you should try some spelling variations:
nganh cong » nhanh chong, thanh cong
thuat canh » thuat lanh, thuat cong, thuat san
canh trinh » canh tranh, hanh trinh, canh tinh
thu sach » tu sach, thuat sach, thuoc sach
nganh co » nganh hoa, nganh y, anh co
trinh do » trinh ky
do khi » doi khi, do thi, 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 ((nganh co) OR (nganh cong)) khi đong luc ) or ( thuat canh trinh do khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu sach ((nganh co) OR (nganh cong)) khi đong luc ) OR ( thuat canh trinh do khi đong luc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( thu sach ((nganh co) OR (nganh cong)) khi đong luc ) or ( thuat canh trinh do khi đong luc ))".
• Adding a wildcard symbol may retrieve word variants: (( thu sach ((nganh co) OR (nganh cong)) khi đong luc ) or ( thuat canh trinh do khi đong luc ))*.