Perhaps you should try some spelling variations:
dang van » hoang van, hang va
hanh dai » hanh tai, hanh dao, thanh dat
vanh dai » van dai, vanh tai, lanh dao
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky ((nang x) or (dang van)) hoi. hieu va cam xuc va ((hanh dai) OR (vanh dai)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky ((nang x) OR (dang van)) hoi. hieu va cam xuc va ((hanh dai) OR (vanh dai)) cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky ((nang x) or (dang van)) hoi. hieu va cam xuc va ((hanh dai) OR (vanh dai)) cua te*".