Perhaps you should try some spelling variations:
ve triet » va trien, su triet
danh hai » dang hai, lanh hai, manh hai
thac toc » cac toc, thac cac, thi toc
sach tru » sach truc, sach thu, sach tu
va danh » va dinh, va dan, va hanh
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
hac tuc » thai tuc
hai ve » hoai ve, hai va, hai vu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach tru ((nang xa) or (lang xa)) hoi. hieu qua ((hac tuc) OR (thac toc)) va danh hai ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tru ((nang xa) OR (lang xa)) hoi. hieu qua ((hac tuc) OR (thac toc)) va danh hai ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach tru ((nang xa) or (lang xa)) hoi. hieu qua ((hac tuc) OR (thac toc)) va danh hai ve triet".
• Adding a wildcard symbol may retrieve word variants: tu sach tru ((nang xa) or (lang xa)) hoi. hieu qua ((hac tuc) OR (thac toc)) va danh hai ve triet*.