Perhaps you should try some spelling variations:
thay nuoc » tham nuoc, tray nuoc, thoat nuoc
toc sach » hoc sach, doc sach, thuoc sach
hanh lam » thanh lap, hanh kem, hanh va
hanh lai » hanh tai, thanh lap, thanh loi
hieu va » lieu va, hieu qua
va thay » va tham, la thay, va hay
cao hoi » cau hoi, co hoi, cao hoc
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ty nang cao hoi. hieu va thay nuoc va ((hanh lai) OR (hanh lam)) ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang cao hoi. hieu va thay nuoc va ((hanh lai) OR (hanh lam)) ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty nang cao hoi. hieu va thay nuoc va ((hanh lai) OR (hanh lam)) ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang cao hoi. hieu va thay nuoc va ((hanh lai) OR (hanh lam)) ((cua tre) or (cuu tre))*.