Perhaps you should try some spelling variations:
dien cua » dieu cua, dien cuc, dien cu
thu sach » tu sach, thuat sach, thuoc sach
bao duoc » tao duoc, ban duoc, bo duoc
va quang » van quang, va quan, xa quang
thu sac » thu san, thu xac, thu dac
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va bao » va bai
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sac) or (thu sach)) ky nang xa hoi. hieu va bao duoc ((va quang) OR (vu quang)) dien cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sac) OR (thu sach)) ky nang xa hoi. hieu va bao duoc ((va quang) OR (vu quang)) dien cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sac) or (thu sach)) ky nang xa hoi. hieu va bao duoc ((va quang) OR (vu quang)) dien cua tu".
• Adding a wildcard symbol may retrieve word variants: ((thu sac) or (thu sach)) ky nang xa hoi. hieu va bao duoc ((va quang) OR (vu quang)) dien cua tu*.