Perhaps you should try some spelling variations:
thien cac » thien cau, thieu cac, trien cac
hien cac » vien cac, hieu cac, dien cac
van hanh » van thanh, ban hanh, van anh
hanh vai » hanh vi, hanh va, hanh tai
su sach » so sach
vu sach » vu bach, vu khach
nang xa » nang x, lang xa, nang ma
vai cua » dai cua, hai cua, lai 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: ((su sach) OR (vu sach)) ky nang xa hoi. hieu ((hien cac) or (thien cac)) vi van hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang xa hoi. hieu ((hien cac) OR (thien cac)) vi van hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) ky nang xa hoi. hieu ((hien cac) or (thien cac)) vi van hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) ky nang xa hoi. hieu ((hien cac) or (thien cac)) vi van hanh vai cua te*.