Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
te sach » toc sach
va hanh » van hanh, va thanh, va danh
hac luc » nhan luc, than luc
sach ty » sach y, sach tu, sach thu
van hac » van hoc, van ha, van hai
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
luc va » duc va, tuc va, loc va
di cua » dai cua, doi cua, do cua
de cua » le cua, te cua, dieu cua

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 ty ((nang xa) or (lang xa)) hoi. hieu van hac luc va hanh ((di cua) OR (de cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang xa) OR (lang xa)) hoi. hieu van hac luc va hanh ((di cua) OR (de cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((nang xa) or (lang xa)) hoi. hieu van hac luc va hanh ((di cua) OR (de cua)) tre*".