Perhaps you should try some spelling variations:
tien cua » trien cua, tiep cua, dien cua
kien cua » khien cua, dien cua, bien cua
cham hoc » cham soc, chat hoc, cham hoi
te sach » toc sach
so cham » so kham, co cham, so chat
va danh » va dinh, va dan, va hanh
hieu so » thieu so
v nang » va nang, vu nang, van nang

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 ((2 nang) or (v nang)) xa hoi. hieu so cham hoc va danh ((kien cua) OR (tien cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((2 nang) OR (v nang)) xa hoi. hieu so cham hoc va danh ((kien cua) OR (tien cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((2 nang) or (v nang)) xa hoi. hieu so cham hoc va danh ((kien cua) OR (tien cua)) te".
• Adding a wildcard symbol may retrieve word variants: te sach ((2 nang) or (v nang)) xa hoi. hieu so cham hoc va danh ((kien cua) OR (tien cua)) te*.