Perhaps you should try some spelling variations:
te sach » toc sach
ty nang » ty xang, ty hang, ly nang
hieu va » hieu qua
hanh xu » hanh tu, hanh sua, hanh cua
van dan » van ban, ban dan, van dao
cua tre » cua te, cuu tre, cua triet
xu van » tu van, vu van, su van
dan de » dan den, dang de, van de
de cua » le cua, te cua, dieu cua

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 ((ty nang) or (ky nang)) xa hoi. ((hieu va) OR (lieu va)) hanh xu van dan de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty nang) OR (ky nang)) xa hoi. ((hieu va) OR (lieu va)) hanh xu van dan de cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ty nang) or (ky nang)) xa hoi. ((hieu va) OR (lieu va)) hanh xu van dan de cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((ty nang) or (ky nang)) xa hoi. ((hieu va) OR (lieu va)) hanh xu van dan de cua tre*.