Perhaps you should try some spelling variations:
luoc van » luoc can, luoc va, luc van
cuoc van » cuoi van, quoc van, cuu van
te sach » toc sach
hanh di » hanh vi, hanh de, hang di
sach ky » sac ky, sach y, sach ty
hieu su » hieu sau, tieu su, hieu so
hieu vu » hieu va, hieu ve, dieu vu
nang xa » nang x, lang xa, nang ma
di cua » dai cua, doi cua, de 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: te sach ky nang xa hoi. ((hieu vu) OR (hieu su)) kham ((cuoc van) or (luoc van)) hanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. ((hieu vu) OR (hieu su)) kham ((cuoc van) OR (luoc van)) hanh di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. ((hieu vu) OR (hieu su)) kham ((cuoc van) or (luoc van)) hanh di cua te".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. ((hieu vu) OR (hieu su)) kham ((cuoc van) or (luoc van)) hanh di cua te*.