Perhaps you should try some spelling variations:
chat nuoc » nhat nuoc, khat nuoc, thoat nuoc
nang mai » nang ma, nang tai, lang mai
tinh lap » trinh lap, tinh lao, dinh lap
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cua triet, dua tren
va tinh » may tinh
tu sach » thu sach, su sach, te sach
hieu ve » hieu va
mai hoi » mai khoi, dai hoi, lai hoi
cuu tre » cau tren, cau treo
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: tu sach y nang mai hoi. ((hieu ve) or (hieu van)) chat nuoc va tinh lap ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang mai hoi. ((hieu ve) OR (hieu van)) chat nuoc va tinh lap ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach y nang mai hoi. ((hieu ve) or (hieu van)) chat nuoc va tinh lap ((cua tre) or (cuu tre))*.