Perhaps you should try some spelling variations:
tan thanh » tran thanh, tang thanh, toan thanh
thu sach » thuat sach, thuoc sach, thu hoach
sang cua » song cua, hang cua, tang cua
mang cua » manh cua, dung cua, ban cua
tu sach » su sach, te sach, tu cach
ty nang » ky nang, ty xang, ty hang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cac duc » cac du, cao duc, cac dac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) OR (tu sach)) ty nang xa hoi. hieu va cac duc tan thanh ((sang cua) or (mang cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) ty nang xa hoi. hieu va cac duc tan thanh ((sang cua) OR (mang cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (tu sach)) ty nang xa hoi. hieu va cac duc tan thanh ((sang cua) or (mang cua)) te".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (tu sach)) ty nang xa hoi. hieu va cac duc tan thanh ((sang cua) or (mang cua)) te*.