Perhaps you should try some spelling variations:
pham sach » pham anh, nam sach, pham hanh
nuoc sach » nguoi sach, hoc sach, cuoc cach
cham sac » cham soc, cap sac, cham mat
van tuan » van quan, van ban, anh tuan
tu sach » thu sach, su sach, te sach
tuan vi » quan vi, luan vi, quans vi
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (nuoc sach)) ty nang xa hoi. hieu va ((cham sac) OR (pham sach)) van tuan vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (nuoc sach)) ty nang xa hoi. hieu va ((cham sac) OR (pham sach)) van tuan vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (nuoc sach)) ty nang xa hoi. hieu va ((cham sac) OR (pham sach)) van tuan vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (nuoc sach)) ty nang xa hoi. hieu va ((cham sac) OR (pham sach)) van tuan vi cuu tre*.