Perhaps you should try some spelling variations:
lang xa » lang ha, dang xay, lang van
hieu ke » hieu kem, chieu ke, hieu ky
truc va » thuc va, thuc vat, trung va
danh li » dan li, dinh li, danh lien
danh di » danh du, xanh di, danh dien
ca tren » cau tren, cu tren, la tren
sinh y » sinh ly
y lang » o lang, _ lang, tay lang
ke cau » ket cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sinh y lang xa hoi. hieu ke cau truc va ((danh li) OR (danh di)) ca tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sinh y lang xa hoi. hieu ke cau truc va ((danh li) OR (danh di)) ca tren".
• Adding a wildcard symbol may retrieve word variants: hoc sinh y lang xa hoi. hieu ke cau truc va ((danh li) OR (danh di)) ca tren*.