Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
lam chau » lai chau, lam chu, lam chat
dinh lam » dinh van, tinh lao
hieu van » hieu va, thien van, lieu va
chau tre » chay tren, chau tho, cho tre
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va
va dinh » van dinh, va kinh, va tinh
nang xa » nang x, lang xa, mang xa
san ky » sang ky, van ky, dan ky
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat san ky ((nang xa) OR (nang ma)) hoi. ((hieu ve) or (hieu van)) coc luc va dinh lam chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat san ky ((nang xa) OR (nang ma)) hoi. ((hieu ve) OR (hieu van)) coc luc va dinh lam chau tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat san ky ((nang xa) OR (nang ma)) hoi. ((hieu ve) or (hieu van)) coc luc va dinh lam chau tre".
• Adding a wildcard symbol may retrieve word variants: thuat san ky ((nang xa) OR (nang ma)) hoi. ((hieu ve) or (hieu van)) coc luc va dinh lam chau tre*.