Perhaps you should try some spelling variations:
thien ket » thien ke, thiet ke
hieu ket » hieu kem, lien ket, hieu ky
te sach » toc sach
va danh » va dinh, va dan, va hanh
cau luc » cau truc, cau phuc
sach ly » sach y, sach lo, sach ty
nang ra » nang ma, lang ra, nang ro
ly nang » ky nang, ly hang, ly vang
ra hoi » ra khoi, xa hoi, va hoi
luc va » duc va, tuc va, loc va
di cua » doi cua, de cua, do 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 ly nang ra hoi. ((hieu ket) OR (thien ket)) cau luc va danh ((di cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly nang ra hoi. ((hieu ket) OR (thien ket)) cau luc va danh ((di cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ly nang ra hoi. ((hieu ket) OR (thien ket)) cau luc va danh ((di cua) or (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach ly nang ra hoi. ((hieu ket) OR (thien ket)) cau luc va danh ((di cua) or (dai cua)) tre*.