Perhaps you should try some spelling variations:
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
hanh dai » hanh tai, hanh dao, vanh dai
te sach » toc sach
dai cuu » dai cua, dai huu
va hanh » van hanh, va thanh, va danh
cac dac » cac dan, cac dai, cac bac
cuu tre » cua tre, cau tren, cau treo
sach ty » sach y, sach tu, sach thu
cac duc » cac du, cao duc, cac cuoc
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
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 xa hoi. hieu va ((((cac duc) OR (cac nuoc))) or (cac dac)) va hanh dai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang xa hoi. hieu va ((((cac duc) OR (cac nuoc))) OR (cac dac)) va hanh dai cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang xa hoi. hieu va ((((cac duc) OR (cac nuoc))) or (cac dac)) va hanh dai cuu tre*".