Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
toc sach » hoc sach, doc sach, thuoc sach
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, xuc ban
cac xuc » cam xuc, cac nuoc, chat xuc
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
cua cau » cua cac, cua chu, cua cay
ma hoi » mai hoi, xa hoi, ma hoa
cua cu » cua chu, cua su, cua co

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) or (toc sach)) ty nang ma hoi. hieu va cac xuc van hanh vi ((cua cu) OR (cua cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ty nang ma hoi. hieu va cac xuc van hanh vi ((cua cu) OR (cua cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) ty nang ma hoi. hieu va cac xuc van hanh vi ((cua cu) OR (cua cau))".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ty nang ma hoi. hieu va cac xuc van hanh vi ((cua cu) OR (cua cau))*.