Perhaps you should try some spelling variations:
vanh dai » van dai, vanh tai, van dao
sach thu » sach thue, sach thieu, sach tham
te sach » toc sach
nang ma » tang ma, sang ma, mang may
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
ve cac » va cac, vien cac
cua tu » cua tuc, cua su, cua cu

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 thu ((nang ma) or (nang cao)) hoi. hieu ve cac xuc van ((vanh dai) OR (lanh dao)) cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thu ((nang ma) OR (nang cao)) hoi. hieu ve cac xuc van ((vanh dai) OR (lanh dao)) cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach thu ((nang ma) or (nang cao)) hoi. hieu ve cac xuc van ((vanh dai) OR (lanh dao)) cua tu".
• Adding a wildcard symbol may retrieve word variants: te sach thu ((nang ma) or (nang cao)) hoi. hieu ve cac xuc van ((vanh dai) OR (lanh dao)) cua tu*.