Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
dua tren » dung tren
van hanh » van thanh, ban hanh, van anh
luc van » luoc van, luu van, duc van
cam luc » cam xuc, cau luc
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
san ky » sang ky, van ky, dan ky
va cam » va cham, va cac, va cao
cua te » cua tu

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 va cam luc van hanh vi ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat san ky ((nang xa) OR (nang ma)) hoi. hieu va cam luc van hanh vi ((dua tren) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat san ky ((nang xa) OR (nang ma)) hoi. hieu va cam luc van hanh vi ((dua tren) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: thuat san ky ((nang xa) OR (nang ma)) hoi. hieu va cam luc van hanh vi ((dua tren) or (cua te))*.