Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
nam truc » nam truoc, nam thuc, nam trung
truc lap » truc va, truc may, tu lap
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
qua nam » quan nam, cua nam, quang nam
tu cua » hu cua
vu cua » hu cua

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 (thu sach)) ky nang xa hoi. hieu qua nam truc lap trinh ((tu cua) or (vu cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang xa hoi. hieu qua nam truc lap trinh ((tu cua) OR (vu cua)) tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang xa hoi. hieu qua nam truc lap trinh ((tu cua) or (vu cua)) tre*.