Perhaps you should try some spelling variations:
chua tre » chua tri, cua tre, chua trieu
sach ty » sach y, sach tu, sach thu
hanh va » hang va
duc van » duc va, duc tan, duc manh
cam duc » cam xuc, cao duc, pham duc
te sach » toc sach
hieu va » lieu va, hieu qua
hieu ve » hieu van
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang

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 ty nang ma hoa. ((hieu ve) or (hieu va)) cam duc van ((hanh va) OR (hanh vi)) chua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ma hoa. ((hieu ve) OR (hieu va)) cam duc van ((hanh va) OR (hanh vi)) chua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ma hoa. ((hieu ve) or (hieu va)) cam duc van ((hanh va) OR (hanh vi)) chua tre*".