Perhaps you should try some spelling variations:
nuoc van » nuoc san, luoc van, nuoc dan
hanh lam » thanh lap, hanh kem, hanh va
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » lang xa, nang ma, mang xa
qua cac » cua cac
lam cua » nam cua, lam chat
cua tre » cua te, cuu tre, cua triet

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 ky ((nang xa) or (nang x)) hoi. hieu qua cac ((nuoc van) OR (nuoc va)) hanh lam cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang xa) OR (nang x)) hoi. hieu qua cac ((nuoc van) OR (nuoc va)) hanh lam cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang xa) or (nang x)) hoi. hieu qua cac ((nuoc van) OR (nuoc va)) hanh lam cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang xa) or (nang x)) hoi. hieu qua cac ((nuoc van) OR (nuoc va)) hanh lam cua tre*.