Perhaps you should try some spelling variations:
tu triet » su triet, tu thiet, tu trien
danh tai » doanh tai, dinh tai, hanh tai
hieu van » hieu va, thien van, lieu va
te sach » toc sach
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
van hac » van hoc, van ha, van hai
luc va » duc va, loc va
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y ((nang xa) or (lang xa)) hoi. hieu van hac ((luc va) or (tuc va)) danh tai tu triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang xa) OR (lang xa)) hoi. hieu van hac ((luc va) OR (tuc va)) danh tai tu triet.
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang xa) or (lang xa)) hoi. hieu van hac ((luc va) or (tuc va)) danh tai tu triet*.