Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thu sach » tu sach, thuoc sach, thu hoach
hanh vai » hanh vi, hanh va, hanh tai
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
vai cua » dai cua, hai cua, lai cua
ve cac » va cac, vien cac
xac va » tac va, ac va, bac va
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: ((thu sach) OR (thuat sach)) ky nang xa hoi. hieu ve cac ((xac va) or (duc va)) hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuat sach)) ky nang xa hoi. hieu ve cac ((xac va) OR (duc va)) hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) OR (thuat sach)) ky nang xa hoi. hieu ve cac ((xac va) or (duc va)) hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) OR (thuat sach)) ky nang xa hoi. hieu ve cac ((xac va) or (duc va)) hanh vai cua te*.