Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nang mai » nang ma, nang tai, lang mai
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va
soc van » hoc van, oc van, sac van
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, dua tren
y nang » ky nang, ly nang, v nang

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 y nang mai hoi. ((hieu va) or (hieu qua)) cham soc van hanh di ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang mai hoi. ((hieu va) OR (hieu qua)) cham soc van hanh di ((cua tre) OR (cua triet)).
• Adding a wildcard symbol may retrieve word variants: te sach y nang mai hoi. ((hieu va) or (hieu qua)) cham soc van hanh di ((cua tre) or (cua triet))*.