Perhaps you should try some spelling variations:
hanh kien » danh kien, anh kien, thanh vien
van hanh » van thanh, ban hanh, van anh
kien su » nien su, tien su, vien sau
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
hieu va » lieu va, hieu qua
sang ma » tang ma, sang tao, mang may
sach vu » sach va, sach uu, sach xu
nang ma » tang ma, nang cao, mang may
sach tu » sach thu, cach tu, sach ty
su viet » so viet

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu ((sach vu) OR (sach tu)) ((nang ma) or (sang ma)) hoi. hieu va cac xuc van hanh kien su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach vu) OR (sach tu)) ((nang ma) OR (sang ma)) hoi. hieu va cac xuc van hanh kien su viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sach vu) OR (sach tu)) ((nang ma) or (sang ma)) hoi. hieu va cac xuc van hanh kien su viet".
• Adding a wildcard symbol may retrieve word variants: vu ((sach vu) OR (sach tu)) ((nang ma) or (sang ma)) hoi. hieu va cac xuc van hanh kien su viet*.