Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thu sach » tu sach, thuoc sach, thu hoach
trung va » truong va, trang va, trung ha
hieu cao » chieu cao, hieu cac, hieu ca
danh de » hanh de, dan de, dang de
cao cau » cao cap, co cau, tao cau
truc va » thuc va, thuc vat
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
de cua » le cua, te cua, dieu cua

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 (thuat sach)) ky nang xa hoi. hieu cao cau ((truc va) OR (trung va)) danh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuat sach)) ky nang xa hoi. hieu cao cau ((truc va) OR (trung va)) danh de cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (thuat sach)) ky nang xa hoi. hieu cao cau ((truc va) OR (trung va)) danh de cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuat sach)) ky nang xa hoi. hieu cao cau ((truc va) OR (trung va)) danh de cua tre*.