Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
lanh kha » lang kham, lanh nham, manh khai
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu van
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
vi luu » vi lua
tru » truc

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat lanh kha ((nang xa) OR (nang ma)) hoi. ((hieu ve) or (hieu va)) pham duc va hanh vi luu tru~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat lanh kha ((nang xa) OR (nang ma)) hoi. ((hieu ve) OR (hieu va)) pham duc va hanh vi luu tru.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat lanh kha ((nang xa) OR (nang ma)) hoi. ((hieu ve) or (hieu va)) pham duc va hanh vi luu tru".
• Adding a wildcard symbol may retrieve word variants: thuat lanh kha ((nang xa) OR (nang ma)) hoi. ((hieu ve) or (hieu va)) pham duc va hanh vi luu tru*.