Perhaps you should try some spelling variations:
thuat cao » thuat co, thuat bao, thuat cam
va triet » va thiet, va trien, ve triet
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu va » lieu va, hieu qua
va cham » va chat, va tham
truc va » thuc va, thuc vat, trung va
hanh tu » anh tu, danh 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 cao ky ((nang xa) OR (lang xa)) hoi. hieu va cham ((duc va) or (truc va)) hanh tu va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat cao ky ((nang xa) OR (lang xa)) hoi. hieu va cham ((duc va) OR (truc va)) hanh tu va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat cao ky ((nang xa) OR (lang xa)) hoi. hieu va cham ((duc va) or (truc va)) hanh tu va triet".
• Adding a wildcard symbol may retrieve word variants: thuat cao ky ((nang xa) OR (lang xa)) hoi. hieu va cham ((duc va) or (truc va)) hanh tu va triet*.