Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
thanh ve » hanh ve, thanh va, thanh vien
va thanh » gia thanh, ban thanh, va tinh
nam duoc » nam thuoc, da duoc, dat duoc
hieu va » lieu va, hieu qua
cao suc » cao su, cao duc
v nang » va nang, vu nang, van nang
y nang » ky nang, ly nang, may nang
ve cua » le cua, de cua, te cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach ((y nang) OR (v nang)) xa hoi. hieu va ((nam duoc) or (cao suc)) va thanh ve cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach ((y nang) OR (v nang)) xa hoi. hieu va ((nam duoc) OR (cao suc)) va thanh ve cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc sach ((y nang) OR (v nang)) xa hoi. hieu va ((nam duoc) or (cao suc)) va thanh ve cua te".
• Adding a wildcard symbol may retrieve word variants: thuoc sach ((y nang) OR (v nang)) xa hoi. hieu va ((nam duoc) or (cao suc)) va thanh ve cua te*.