Perhaps you should try some spelling variations:
lang chai » lang ha, lang cua, lang phi
tu triet » su triet, tu thiet, tu trien
tu sach » thu sach, su sach, te sach
ty nang » ty xang, ty hang, ly nang
va lang » va nang, hoa lang
chai tu » cai tu, choi tu, chay tu
va nam » van nam, ha nam
va nay » va ngay, va cay
thu va » thuc va, thue va, tu va

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 ((ty nang) or (ky nang)) xa hoi. hieu ((va nam) OR (va nay)) thu va lang chai tu triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ky nang)) xa hoi. hieu ((va nam) OR (va nay)) thu va lang chai tu triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) or (ky nang)) xa hoi. hieu ((va nam) OR (va nay)) thu va lang chai tu triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) or (ky nang)) xa hoi. hieu ((va nam) OR (va nay)) thu va lang chai tu triet*.