Perhaps you should try some spelling variations:
lan thuong » han thuong, lan phuong, hang thuong
hieu tinh » chieu tinh, lieu tinh, hieu binh
kieu tinh » lieu tinh, trieu tinh, diep tinh
luong van » luong va, duong van, luong quan
luong vat » luong va, luong tai, dong vat
anh dung » anh dong, anh huong, sach dung
dung lan » dung luan, dung land, dung lam
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu tinh) or (kieu tinh)) - anh dung lan thuong ((luong van) OR (luong vat)) than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu tinh) OR (kieu tinh)) - anh dung lan thuong ((luong van) OR (luong vat)) than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu tinh) or (kieu tinh)) - anh dung lan thuong ((luong van) OR (luong vat)) than cau".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu tinh) or (kieu tinh)) - anh dung lan thuong ((luong van) OR (luong vat)) than cau*.