Perhaps you should try some spelling variations:
thoat nuoc » thuat nuoi
van thoat » van hoat, van thoai, van hoa
hieu van » hieu va, thien van, lieu va
lai cua » hai cua, lai chau, thai cua
va danh » va dinh, va dan, va hanh
te sach » toc sach
cao hoi » cau hoi, co hoi, cao hoc
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly 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 ((ty nang) or (ty hang)) cao hoi. hieu van thoat nuoc va danh ((lai cua) OR (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty nang) OR (ty hang)) cao hoi. hieu van thoat nuoc va danh ((lai cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ty nang) or (ty hang)) cao hoi. hieu van thoat nuoc va danh ((lai cua) OR (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((ty nang) or (ty hang)) cao hoi. hieu van thoat nuoc va danh ((lai cua) OR (dai cua)) tre*.